Planetary system (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Planetary system" in Simple English language version.

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archive.org

Schneider J. Interactive Extra-solar Planets Catalog. The Extrasolar Planets Encyclopedia. [1]
Schneider, Jean (2011). "Interactive Extra-solar Planets Catalog". The Extrasolar Planets Encyclopedia. Retrieved 2012-07-13.
Schneider, Jean (2011). "Interactive Extra-solar Planets Catalog". The Extrasolar Planets Encyclopaedia. Retrieved 2012-01-30.