Não informado. (2014). Geological Survey Professional Paper. U.S. Geological Survey Professional Paper.
Chicago-viite (17. p.)Não informado. Geological Survey Professional Paper. Washington: U.S. Geological Survey Professional Paper, 2014.
MLA-viite (8. p.)Não informado. Geological Survey Professional Paper. U.S. Geological Survey Professional Paper, 2014.
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