Earle, K. W. (1936). The geological map: An elementary text book for students of geography and geology. Methuen.
Chicago-referens (17:e uppl.)Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. London: Methuen, 1936.
MLA-referens (8:e uppl.)Earle, Kenneth W. The Geological Map: An Elementary Text Book for Students of Geography and Geology. Methuen, 1936.
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