The Washington Reporter - Jan 2, 1952

http://news.google.com/newspapers?id=rlpfAAAAIBAJ&sjid=ylsNAAAAIBAJ&pg=1227,42613&dq=planet-x&hl=en

The Evening Independent - Oct 14, 1963

http://news.google.com/newspapers?id=B0xQAAAAIBAJ&sjid=4lYDAAAAIBAJ&pg=3978,2391775&dq=planet-x&hl=en

The Victoria Advocate - Jun 13, 1968

http://news.google.com/newspapers?id=1b1dAAAAIBAJ&sjid=FF4NAAAAIBAJ&pg=4295,3505361&dq=planet-x&hl=en

The Nevada Daily Mail - Apr 26, 1972

http://news.google.com/newspapers?id=Ml4fAAAAIBAJ&sjid=fdQEAAAAIBAJ&pg=4900,6392564&dq=planet-x&hl=en

Bangor Daily News - Apr 28, 1972

http://news.google.com/newspapers?id=mTY0AAAAIBAJ&sjid=dOEIAAAAIBAJ&pg=2187,4909444&dq=planet-x&hl=en

Beaver County Times - Apr 28, 1972

http://news.google.com/newspapers?id=Q7EiAAAAIBAJ&sjid=OrMFAAAAIBAJ&pg=6787,3719602&dq=planet-x&hl=en

The Phoenix - Apr 28, 1972

http://news.google.com/newspapers?id=Nt1gAAAAIBAJ&sjid=228NAAAAIBAJ&pg=6826,6525635&dq=planet-x&hl=en

Pittsburgh Post-Gazette - Apr 29, 1972

http://news.google.com/newspapers?id=5pxRAAAAIBAJ&sjid=xGwDAAAAIBAJ&pg=1908,4429801&dq=planet-x&hl=en

Sunday Times-Sentinel - Apr 30, 1972

http://news.google.com/newspapers?id=y_5DAAAAIBAJ&sjid=R7AMAAAAIBAJ&pg=1058,2189460&dq=planet-x&hl=en

The Sydney Morning Herald - May 2, 1972

http://news.google.com/newspapers?id=zHlWAAAAIBAJ&sjid=fOUDAAAAIBAJ&pg=1101,230370&dq=planet-x&hl=en

The Montreal Gazette - May 6, 1972

http://news.google.com/newspapers?id=vYIuAAAAIBAJ&sjid=O6EFAAAAIBAJ&pg=3935,7361410&dq=planet-x&hl=en

Sarasota Herald-Tribune - Jul 16, 1972

http://news.google.com/newspapers?id=Lj4gAAAAIBAJ&sjid=nGYEAAAAIBAJ&pg=2407,1299539&dq=planet-x&hl=en

Tri City Herald - Nov 2, 1972

http://news.google.com/newspapers?id=bdgwAAAAIBAJ&sjid=jOEFAAAAIBAJ&pg=835,434474&dq=planet-x&hl=en

The Rochester Sentinel - Feb 2, 1973

http://news.google.com/newspapers?id=7RhjAAAAIBAJ&sjid=mnMNAAAAIBAJ&pg=914,1345553&dq=planet-x&hl=en

The Times-News - Feb 19, 1980

http://news.google.com/newspapers?id=BzEaAAAAIBAJ&sjid=oCQEAAAAIBAJ&pg=6851,4649996&dq=planet-x&hl=en

Anchorage Daily News - Mar 1, 1980

http://news.google.com/newspapers?id=5YI0AAAAIBAJ&sjid=dqcEAAAAIBAJ&pg=2926,204442&dq=planet-x&hl=en

Lakeland Ledger - Mar 9, 1980

http://news.google.com/newspapers?id=iLhMAAAAIBAJ&sjid=1foDAAAAIBAJ&pg=6609,3017268&dq=planet-x&hl=en

Ocala Star-Banner - Apr 9, 1980

http://news.google.com/newspapers?id=HH5RAAAAIBAJ&sjid=EAYEAAAAIBAJ&pg=7109,3322366&dq=planet-x&hl=en

The Miami News - Oct 6, 1980

http://news.google.com/newspapers?id=jtAlAAAAIBAJ&sjid=hPMFAAAAIBAJ&pg=776,1752271&dq=planet-x&hl=en

The Times-News - Feb 19, 1980

http://news.google.com/newspapers?id=BzEaAAAAIBAJ&sjid=oCQEAAAAIBAJ&pg=6851,4649996&dq=planet-x&hl=en

Anchorage Daily News - Mar 1, 1980

http://news.google.com/newspapers?id=5YI0AAAAIBAJ&sjid=dqcEAAAAIBAJ&pg=2926,204442&dq=planet-x&hl=en

Lakeland Ledger - Mar 9, 1980

http://news.google.com/newspapers?id=iLhMAAAAIBAJ&sjid=1foDAAAAIBAJ&pg=6609,3017268&dq=planet-x&hl=en

Ocala Star-Banner - Apr 9, 1980

http://news.google.com/newspapers?id=HH5RAAAAIBAJ&sjid=EAYEAAAAIBAJ&pg=7109,3322366&dq=planet-x&hl=en

Anchorage Daily News - Feb 6, 1983

http://news.google.com/newspapers?id=uLAnAAAAIBAJ&sjid=wQQGAAAAIBAJ&pg=1549,2125023&dq=planet-x&hl=en

Time Magazine Monday, Feb. 14, 1983

http://www.time.com/time/magazine/article/0,9171,953705-2,00.html

Daily Leader - Mar 10, 1983

http://news.google.com/newspapers?id=rWBDAAAAIBAJ&sjid=9K0MAAAAIBAJ&pg=1394,1767667&dq=planet-x&hl=en

Nature 31 March 1983

http://www.nature.com/nature/journal/v302/n5907/abs/302399a0.html

Anchorage Daily News - Apr 26, 1983

http://news.google.com/newspapers?id=tsItAAAAIBAJ&sjid=sJ4FAAAAIBAJ&pg=5026,5068362&dq=planet-x&hl=en

NY Times May 1, 1983

http://www.nytimes.com/1983/05/01/weekinreview/ideas-and-trends-happily-in-limbo.html

The Nevada Daily Mail - May 26, 1983

http://news.google.com/newspapers?id=tKEfAAAAIBAJ&sjid=ytUEAAAAIBAJ&pg=1685,4803702&dq=planet-x&hl=en

Eugene Register-Guard - May 29, 1983

http://news.google.com/newspapers?id=uw1WAAAAIBAJ&sjid=MOIDAAAAIBAJ&pg=4047,7071981&dq=planet-x&hl=en

Beaver County Times - Jun 12, 1983

http://news.google.com/newspapers?id=jlkuAAAAIBAJ&sjid=hdoFAAAAIBAJ&pg=2684,2306833&dq=planet-x&hl=en

Observer-Reporter - Dec 17, 1984

http://news.google.com/newspapers?id=ZX1iAAAAIBAJ&sjid=nncNAAAAIBAJ&pg=1194,2624924&dq=planet-x&hl=en

NY Times December 18, 1984

http://www.nytimes.com/1984/12/18/science/search-for-nemesis-intensifies-debate.html

The Age - Dec 19, 1984

http://news.google.com/newspapers?id=JlFVAAAAIBAJ&sjid=uZUDAAAAIBAJ&pg=1519,671718&dq=planet-x&hl=en

Record-Journal - Dec 20, 1984

http://news.google.com/newspapers?id=S81jAAAAIBAJ&sjid=cAENAAAAIBAJ&pg=1453,4294080&dq=planet-x&hl=en

Ocala Star-Banner - Dec 30, 1984

http://news.google.com/newspapers?id=cJJPAAAAIBAJ&sjid=HQYEAAAAIBAJ&pg=5064,8206287&dq=planet-x&hl=en

The Deseret News - Jan 13, 1985

http://news.google.com/newspapers?id=iBpTAAAAIBAJ&sjid=-4IDAAAAIBAJ&pg=1976,4160569&dq=planet-x&hl=en

Lakeland Ledger - Jan 13, 1985

http://news.google.com/newspapers?id=C94vAAAAIBAJ&sjid=5vsDAAAAIBAJ&pg=3610,3960798&dq=planet-x&hl=en

Times Daily - Jan 13, 1985

http://news.google.com/newspapers?id=_k4gAAAAIBAJ&sjid=CcgEAAAAIBAJ&pg=5004,2207362&dq=planet-x&hl=en

Daily Union - Jan 15, 1985

http://news.google.com/newspapers?id=WsVEAAAAIBAJ&sjid=irYMAAAAIBAJ&pg=1603,910077&dq=planet-x&hl=en

The Leader-Post - Jan 16, 1985

http://news.google.com/newspapers?id=eYhWAAAAIBAJ&sjid=R0ENAAAAIBAJ&pg=2700,69818&dq=planet-x&hl=en

The Free Lance-Star - Jan 25, 1985

http://news.google.com/newspapers?id=9vhNAAAAIBAJ&sjid=V4sDAAAAIBAJ&pg=6775,3561094&dq=planet-x&hl=en

NY Times July 1, 1987

http://www.nytimes.com/1987/07/01/us/looking-for-planet-x-old-clues-new-theory.html

Schenectady Gazette - Jul 3, 1987

http://news.google.com/newspapers?id=yg8hAAAAIBAJ&sjid=inIFAAAAIBAJ&pg=2398,969951&dq=planet-x&hl=en

Gainesville Sun - Jul 8, 1987

http://news.google.com/newspapers?id=HD5WAAAAIBAJ&sjid=A-oDAAAAIBAJ&pg=5139,2057715&dq=planet-x&hl=en

The Telegraph - Oct 4, 1987

http://news.google.com/newspapers?id=x5dKAAAAIBAJ&sjid=R5QMAAAAIBAJ&pg=3645,1147539&dq=planet-x&hl=en

Spokane Chronicle - Oct 5, 1987

http://news.google.com/newspapers?id=94ZOAAAAIBAJ&sjid=9voDAAAAIBAJ&pg=5742,828490&dq=planet-x&hl=en

The Hour - Oct 29, 1987

http://news.google.com/newspapers?id=9f8gAAAAIBAJ&sjid=2HQFAAAAIBAJ&pg=1281,5550802&dq=planet-x&hl=en

Bangor Daily News - Jun 14, 1988

http://news.google.com/newspapers?id=pqdJAAAAIBAJ&sjid=HQ4NAAAAIBAJ&pg=1929,4423328&dq=planet-x&hl=en

The Pittsburgh Press - Jun 14, 1988

http://news.google.com/newspapers?id=cN4cAAAAIBAJ&sjid=dWMEAAAAIBAJ&pg=5962,8760495&dq=planet-x&hl=en

Reading Eagle - Jun 14, 1988

http://news.google.com/newspapers?id=DrgxAAAAIBAJ&sjid=WuUFAAAAIBAJ&pg=7014,6105078&dq=planet-x&hl=en

The Hour - Jun 15, 1988

http://news.google.com/newspapers?id=2iZJAAAAIBAJ&sjid=dQYNAAAAIBAJ&pg=3184,2586763&dq=planet-x&hl=en

Gadsden Times - Aug 12, 1988

http://news.google.com/newspapers?id=8GMfAAAAIBAJ&sjid=uNQEAAAAIBAJ&pg=3713,1307223&dq=planet-x&hl=en

The Modesto Bee - Sep 15, 1988

http://news.google.com/newspapers?id=j0YjAAAAIBAJ&sjid=5csFAAAAIBAJ&pg=2132,4211439&dq=planet-x&hl=en

Schenectady Gazette - Sep 15, 1988

http://news.google.com/newspapers?id=JmItAAAAIBAJ&sjid=gogFAAAAIBAJ&pg=3241,3533270&dq=planet-x&hl=en

Gadsden Times - Jan 11, 1990

http://news.google.com/newspapers?id=7qwfAAAAIBAJ&sjid=idYEAAAAIBAJ&pg=5264,1084003&dq=planet-x&hl=en

New Straits Times - Jan 12, 1990

http://news.google.com/newspapers?id=U6RUAAAAIBAJ&sjid=iZADAAAAIBAJ&pg=2826,2740606&dq=planet-x&hl=en

Lawrence Journal-World - Apr 22, 1990

http://news.google.com/newspapers?id=I7gxAAAAIBAJ&sjid=G-UFAAAAIBAJ&pg=4472,6237889&dq=planet-x&hl=en

The Free Lance-Star - Apr 26, 1990

http://news.google.com/newspapers?id=KuZLAAAAIBAJ&sjid=BYwDAAAAIBAJ&pg=5921,1130385&dq=planet-x&hl=en

Record-Journal - May 1, 1990

http://news.google.com/newspapers?id=nzxIAAAAIBAJ&sjid=IQENAAAAIBAJ&pg=1179,79340&dq=planet-x&hl=en

Kentucky New Era - Dec 10, 1990

http://news.google.com/newspapers?id=xPMrAAAAIBAJ&sjid=RmoFAAAAIBAJ&pg=1511,3854432&dq=planet-x&hl=en

Toledo Blade - Dec 23, 1990

http://news.google.com/newspapers?id=dScxAAAAIBAJ&sjid=JAMEAAAAIBAJ&pg=6830,7093251&dq=planet-x&hl=en

Bangor Daily News - Jan 4, 1991

http://news.google.com/newspapers?id=8LBJAAAAIBAJ&sjid=yw4NAAAAIBAJ&pg=1184,1204795&dq=planet-x&hl=en

New Scientist, 07 September 1991

http://www.newscientist.com/article/mg13117857.000-letters-planet-from-hell.html

New Scientist, 30 November 1991

http://www.newscientist.com/article/mg13217972.900-science-say-goodbye-to-the-tenth-planet-.html

DER SPIEGEL, 30.12.1991

http://www.spiegel.de/spiegel/print/d-9272390.html

Bangor Daily News - Jan 1, 1992

http://news.google.com/newspapers?id=MKtJAAAAIBAJ&sjid=ZA4NAAAAIBAJ&pg=1346,89832&dq=planet-x&hl=en

NY Times, September 20, 1992

http://www.nytimes.com/1992/09/20/weekinreview/beyond-pluto-an-icy-new-orb.html

NY Times, January 27, 1993

http://www.nytimes.com/1993/01/27/obituaries/robert-harrington-50-astronomer-in-capital.html

New Scientist, 30 January 1993

http://www.newscientist.com/article/mg13718583.300-science-hopes-fade-in-hunt-for-planet-x.html

NY Times, June 01, 1993

http://www.nytimes.com/1993/06/01/science/evidence-for-planet-x-evaporates-in-spotlight-of-new-research.html?pagewanted=3

Lakeland Ledger - Jun 6, 1993

http://news.google.com/newspapers?id=Vt0vAAAAIBAJ&sjid=FP0DAAAAIBAJ&pg=6603,2859755&dq=planet-x&hl=en

The Times-News - Jun 27, 1993

http://news.google.com/newspapers?id=KmFPAAAAIBAJ&sjid=XSUEAAAAIBAJ&pg=6753,5517760&dq=planet-x&hl=en

DTE - Aug 31, 1993

http://www.downtoearth.org.in/node/31392

Discover - September 1, 1993

http://discovermagazine.com/1993/sep/planetxisdead271

Independent - Tuesday, 24 October 1995

http://www.independent.co.uk/news/science/boldly-going-in-search-of-planet-x-1579158.html

Time Magazine - Feb. 05, 1996

http://www.time.com/time/magazine/article/0,9171,984058-2,00.html

The Economist - May 15th 1997

http://www.economist.com/node/149805

The Madison Courier - Jul 12, 1997

http://news.google.com/newspapers?id=6HhjAAAAIBAJ&sjid=dXkNAAAAIBAJ&pg=5277,839778&dq=planet-x&hl=en

New Scientist, 18 October 1997

http://www.newscientist.com/article/mg15621045.800-review--search-the-skies.html

The Atlantic - Feb 1998

http://www.theatlantic.com/magazine/archive/1998/02/when-is-a-planet-not-a-planet/5185/

MSNBC - Oct. 7, 1999

http://www.msnbc.msn.com/id/3077838/m/videos/

The Economist - Oct 14th 1999

http://www.economist.com/node/249969

Science - 15 October 1999

http://www.sciencemag.org/content/286/5439/385.1.summary

Space Daily - Dec. 4, 2000

http://www.spacedaily.com/news/kuiper-00d.html