Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009 [electronic resource] / by P.B. McMahon, J.C. Thomas, and A.G. Hunt ; prepared in cooperation with the Colorado Department of Public Health and Environment.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2011.
