Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009Peter B. McMahon · First published 2011Open the Tome
Vertical gradients in water chemistry and age in the northern High Plains Aquifer, Nebraska, 2003Peter B. McMahon · First published 2007Open the Tome
Water-quality assessment of the High Plains aquifer, 1999-2004Peter B. McMahon · First published 2007Open the Tome
Vertical gradients in water chemistry and age in the southern High Plains aquifer, Texas, 2002Peter B. McMahon · First published 2004Open the Tome
Water movement through thick unsaturated zones overlying the central High Plains aquifer, southwestern Kansas, 2000-2001Peter B. McMahon · First published 2003Open the Tome
Vertical gradients in water chemistry in the central High Plains aquifer, southwestern Kansas and Oklahoma panhandle, 1999Peter B. McMahon · First published 2001Open the Tome
A reconnaissance study of the effect of irrigated agriculture on water quality in the Ogallala Formation, Central High Plains AquiferPeter B. McMahon · First published 2000Open the Tome
In-situ bioremediation of nitrate-contaminated ground waterPeter B McMahon · First published 1998Open the Tome
Quantity and quality of ground-water discharge to the South Platte River, Denver to Fort Lupton, Colorado, August 1992 through July 1993Peter B McMahon · First published 1996Open the Tome
