Breton W Bruce

• Comparative study of ground-water quality, 1976 and 1996, and initial gain-and-loss assessment of Boulder Creek, Boulder County, Colorado
• Ground-water quality beneath irrigated agriculture in the central High Plains aquifer, 1999-2000
• Hydrologic and water-quality data for surface water, ground water and springs in north-central Park County, Colorado, April 1997-November 1998
• Shallow ground-water quality of selected land-use/aquifer settings in the South Platte River Basin, Colorado and Nebraska, 1993-95