Não informado. (1966). Abstracts of North American geology. U.S. Geological Survey.
Style de citation Chicago (17e éd.)Não informado. Abstracts of North American Geology. Washington: U.S. Geological Survey, 1966.
Style de citation MLA (8e éd.)Não informado. Abstracts of North American Geology. U.S. Geological Survey, 1966.
Attention : ces citations peuvent ne pas être correctes à 100%.