Não informado. (1973). Journal of research of the United States Geological Survey. U.S. Geological Survey.
Cita Chicago Style (17a ed.)Não informado. Journal of Research of the United States Geological Survey. Washington: U.S. Geological Survey, 1973.
Cita MLA (8a ed.)Não informado. Journal of Research of the United States Geological Survey. U.S. Geological Survey, 1973.
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