Gamow, George
Matter, earth, and sky / George Gamow
Prentice-Hall, 1963
 Buku Teks
Aiu Ahra
Sky
Gramedia Pustaka Utama, 2016
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Aiu Ahra
Sky
Gramedia Pustaka Utama, 2016
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Press, Frank
Earth
W H Freeman , 1974
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Coomaraswamy, Rama P.
The door in the sky
Princetown University Press, 1997
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