By Alex K. Williamson, Mark D. Munn, Sarah J. Ryker, Richard J. Wagner, James C. Ebbert, and Ann M. Vanderpool
U.S. GEOLOGICAL SURVEY CIRCULAR 1144
A contribution of the National Water-Quality Assessment (NAWQA) Program
The use of firm, trade, and brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Government.
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Last modified: Friday, January 11 2013, 12:09:33 PM