Não informado. (1933). Bibliography and Index of Geology Exclusive of North America. Geological Society of America.
Chicago-Zitierstil (17. Ausg.)Não informado. Bibliography and Index of Geology Exclusive of North America. Washington: Geological Society of America, 1933.
MLA-Zitierstil (8. Ausg.)Não informado. Bibliography and Index of Geology Exclusive of North America. Geological Society of America, 1933.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.