1. Description of techniques to drill, complete, and develop wells and to test and sample aquifers at a surface coal mine in northwestern Colorado Author/Creator: Williams, Robert S., author Publication/Creation: Denver, Colorado : U.S. Department of the Interior, U.S. Geological Survey, 1993 Resource Type: Book Access & Availability: Loading
2. Selected water-quality characteristics and flow of ground water in the San Luis Basin, including the Conejos River Subbasin, Colorado and New Mexico Author/Creator: Williams, Robert S., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Resource Type: Book Access & Availability: Loading
3. Soil-water hydrology and geochemistry of a coal spoil at a reclaimed surface mine in Routt County, Colorado Author/Creator: Williams, Robert S., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading