De Blij, Harm J., author
The earth : a topical geography
John Wiley & Sons, 19880
 Buku Teks
De Blij, Harm J., author
Geography : Regions and concepts
John Wiley & Sons, 1981
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Martin, A.W.
Understanding geography / A.W. Martin
Rigby Limited, 1962
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James, Preston E., author
One world divided : a geographer looks at the modern world
John Wiley & Sons, 1980
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Febvre, Lucien, author
A geographical introduction to history
Routledge, 1996
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