Cinquè planeta (hipotètic) (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Cinquè planeta (hipotètic)" in Catalan language version.

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2web.archive.org

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navy.mil

aa.usno.navy.mil

Hilton, James L. «When did asteroids become minor planets?». O.S. Naval Observatory. Arxivat de l'original el 2006-05-20. [Consulta: 25 maig 2006].

space.com

«Long-Destroyed Fifth Planet May Have Caused Lunar Cataclysm». Space.com. Arxivat de l'original el 8 d'abril de 2002. [Consulta: 9 novembre 2006].

usra.edu

lpi.usra.edu

«A NEW DYNAMICAL MODEL FOR THE LUNAR LATE HEAVY BOMBARDMENT». Chambers and Lissauer, NASA Estimis. [Consulta: 9 novembre 2006].

web.archive.org

Hilton, James L. «When did asteroids become minor planets?». O.S. Naval Observatory. Arxivat de l'original el 2006-05-20. [Consulta: 25 maig 2006].
«Long-Destroyed Fifth Planet May Have Caused Lunar Cataclysm». Space.com. Arxivat de l'original el 8 d'abril de 2002. [Consulta: 9 novembre 2006].