Detailed study of selenium and other constituents in water, bottom sediment, soil, alfalfa, and biota associated with irrigation drainage in the Uncompahgre Project area and in the Grand Valley, west-central Colorado, 1991-93 / by David L. Butler ... [et al.] ; U.S. Geological Survey ... [et al.]. (Water-resources investigations report ; 96-4138.)
Detailed study of selenium and other constituents in water, bottom sediment, soil, alfalfa, and biota associated with irrigation drainage in the Uncompahgre Project area and in the Grand Valley, west-central Colorado, 1991-93 / by David L. Butler ... [et al.] ; U.S. Geological Survey ... [et al.].