1. 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