Não informado. (2014). Geological Survey Professional Paper. U.S. Geological Survey Professional Paper.
Citace podle Chicago (17th ed.)Não informado. Geological Survey Professional Paper. Washington: U.S. Geological Survey Professional Paper, 2014.
Citace podle MLA (8th ed.)Não informado. Geological Survey Professional Paper. U.S. Geological Survey Professional Paper, 2014.
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