Petersen, James F.
Physical geography
Brooks/Cole Cengage Learning, 2012
 Buku Teks SO
Duckson, Don W.
Exercise in physical geography
McGraw-HIll, 1999
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Strahler, Arthur N.
Lab manual for physical geography
John Wiley & Sons, 2004
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Strahler, Arthur N.
Modern physical geography
John Wiley & Sons, 1983
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Trewartha, Glenn T.
Elements of geography : physical and cultural
McGraw-Hill, 1967
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