1. Effects of piping irrigation laterals on selenium and salt loads, Montrose Arroyo Basin, western Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 2001 Format: Book Access & Availability: Loading
2. Field screening of water, soil, bottom sediment, and biota associated with irrigation drainage in the Dolores Project and the Mancos River basin, southwestern Colorado, 1994 Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Department of the Interior, U.S. Geological Survey, 1997 Format: Book Access & Availability: Loading
3. Trend analysis of selected water-quality data associated with salinity-control projects in the Grand Valley, in the lower Gunnison River Basin, and at Meeker Dome, western Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1996 Format: Book Access & Availability: Loading
4. Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Gunnison and Uncompahgre River basins and at Sweitzer Lake, west-central Colorado, 1988-89 Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1991 Format: Book Access & Availability: Loading
5. Estimated water-quality conditions and potential downstream channel effects of the proposed Rock Creek and Wolford Mountain reservoirs, north-central, Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1990 Format: Book Access & Availability: Loading
6. Pesticide data for selected Wyoming streams, 1976-78 Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Cheyenne, Wyoming : U.S. Geological Survey, 1987 Format: Book Access & Availability: Loading
7. Sediment discharge in Rock Creek and the effect of sedimentation rate on the proposed Rock Creek Reservoir, northwestern Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1987 Format: Book Access & Availability: Loading
8. Sediment discharge in the Colorado River near De Beque, Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Lakewood, Colorado : U.S. Geological Survey, 1986 Format: Book Access & Availability: Loading