Boehm, R. G. (2002). Geography the World and it's People volume 1. McGraw - HillCompanies, Inc.
Παραπομπή Chicago StyleBoehm, Richard G. Geography the World and It's People Volume 1. McGraw - HillCompanies, Inc, 2002.
Παραπομπή MLABoehm, Richard G. Geography the World and It's People Volume 1. McGraw - HillCompanies, Inc, 2002.
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