De Blij, Harm J.
Geography : realms, regions, and concepts
John Wiley & Sons, 1994
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De Blij, Harm J.
Geography : realms, regions, and concepts
John Wiley & Sons, 1997
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De Blij, Harm J.
Geography : regions and concepts ; a student supplement to accompany
John Wiley & Sons, 1981
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Holt-Jensen, Arild
Geography history & concepts: a students guide
Publications, 2003
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De Blij, Harm J.
Concepts and regions in geography
John Wiley & Sons, 2005
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