Não informado. (1933). Bibliography and Index of Geology Exclusive of North America. Geological Society of America.
Chicago-referens (17:e uppl.)Não informado. Bibliography and Index of Geology Exclusive of North America. Washington: Geological Society of America, 1933.
MLA-referens (8:e uppl.)Não informado. Bibliography and Index of Geology Exclusive of North America. Geological Society of America, 1933.
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