Sagan, Carl, author
Ballantine Books , 1997
Buku Teks
Oxford University Press , 1994
Buku Teks
edited by Tanja L. Zwaan
[publisher not identified], 1988
Buku Teks
Zulkeffeli Mat Jusoh, editor
Agensi Angkasa Negara, 2010
Buku Referensi
Seedhouse, Erik, author
[Springer, ], 2012
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