Grigg, David
An introduction to agricultural geography
Routledge, 1995
 Buku Teks
Briggs, David J.
Agriculture and environment: the physical geography of temperature agriculture systems
Longman Scientific & Technical, 1994
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Getis, Arthur
Introduction to geography
McGraw-Hill, 2000
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Getis, Arthur
Introduction to geography
McGraw-Hill Higher Education, 2009
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Unwin, Tim
The place of geography
Longman Scientific & Technical, 1992
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