1. Ground-water age and flow at Great Sand Dunes National Monument, south-central Colorado Author/Creator: Rupert, Michael, 1959- Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2004] Format: Book Access & Availability: Loading
2. 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 Format: Book Access & Availability: Loading
3. Improvements to the DRASTIC ground-water vulnerability mapping method Author/Creator: Rupert, Michael, 1959- Publication/Creation: [Reston, Va.] : U.S. Dept. of the interior, U.S. Geological Survey, [1999] Format: Book Access & Availability: Loading