Hoyle, Fred, author
Frontiers of astronomy
Harper & Brothers, 1955
 Buku Teks
Morrison, David, author
Frontiers of astronomy
Saunders College, 1990
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Jastrow, Robert, author
Astronomy : fundamentals and frontiers
John Wiley & Sons, 1977
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Catasrophes and evolution: astronomical foundations /
Cambridge University Press , 1989
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Chapman, Robert D., author
Discovering astronomy
W.H. Freeman, 1978
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