Não informado. (1933). Bibliography and Index of Geology Exclusive of North America. Geological Society of America.
Style de citation Chicago (17e éd.)Não informado. Bibliography and Index of Geology Exclusive of North America. Washington: Geological Society of America, 1933.
Style de citation MLA (8e éd.)Não informado. Bibliography and Index of Geology Exclusive of North America. Geological Society of America, 1933.
Attention : ces citations peuvent ne pas être correctes à 100%.