Volkov, A., author
Earth and Sky
Foreign Languages Publishing House, [date of publication not identified]
 Buku Teks
Gamow, George
Matter, earth, and sky / George Gamow
Prentice-Hall, 1963
 Buku Teks
Aiu Ahra, author
Sky
Gramedia Pustaka Utama, 2016
 Buku Teks
Aiu Ahra, author
Sky
Gramedia Pustaka Utama, 2016
 Buku Teks
Press, Frank, author
Earth
W H Freeman , 1974
 Buku Teks
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