Strahler, Arthur N., author
Physical geography
John Wiley & Sons, 1975
 Buku Teks
Broek, Jan O.M., author
A geography of mankind
McGraw-Hill, 1978
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Freeman, T.W., author
Geography and planning
Hutchinson University Library, 1974
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World geography
edited by Otis W. Freeman and John W. Morris
McGraw-Hill, 1958
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Maguire, David J., author
Computers in geography
Wiley, 1989
 Buku Teks
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