1. Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate in ground water in Colorado Author/Creator: Rupert, Michael, 1959- Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
2. Water quality and trend analysis of Colorado--Big Thompson system reservoirs and related conveyances, 1969 through 2000 Author/Creator: Stevens, Michael R. Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading