Não informado. (1931). Geological Bulletin. Department of Conservation, Geological Survey.
Style de citation Chicago (17e éd.)Não informado. Geological Bulletin. New Orleans, La: Department of Conservation, Geological Survey, 1931.
Style de citation MLA (8e éd.)Não informado. Geological Bulletin. Department of Conservation, Geological Survey, 1931.
Attention : ces citations peuvent ne pas être correctes à 100%.