Gabler, Robert E., author
Essentials of physical geography / Robert E. Gabler
Thomson , 2004
 Buku Teks
Knapp, Brian, author
The challenge of the natural environment
Longman House, 1992
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Muller, Robert A., author
Physical geography today : a portrait of a planet
Random House, 1978
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Newbigin, Marion I.
An introduction to physical geography /Marion I. Newbigin
Dent & sons, Ltd., 1925
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Fundamentals of physical geography
oleh Glenn T. Trewartha [and others]
McGraw-Hill, 1977
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