SNOW, T. P. (1985). The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company.
Chicago-viite (17. p.)SNOW, Theodore P. The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company, 1985.
MLA-viite (8. p.)SNOW, Theodore P. The Dynamic Universe An Introduction To Astronomy Theodore P. Snow. West Publishing Company, 1985.
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