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