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[Reston, Va.] : U.S. Geological Survey, 2004.
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Madison, Wis. : The Survey ; Denver, CO : Open-File Reports Section [distributor], 1993.
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Madison, Wis. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Earth Science Information Center, Open-File Reports Section [distributor], 1996.
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