U.S. Geological Survey Open-File Report 2012-1219
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By Brandy N. Armstrong,1 John C. Warner,1 George Voulgaris,2 Jeffrey H. List,1 E. Robert Thieler,1 Marinna A. Martini,1 Ellyn Montgomery,1 Jesse McNinch,3 Jeffrey W.Book,4 and Kevin Haas5 1U.S. Geological Survey U.S. Department of the Interior U.S. Geological Survey U.S. Geological Survey, Reston, Virginia: 2013
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