1. Distribution of hydrogeologic units in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor] Format: Map Access & Availability: Loading
2. Distribution of oil and natural-gas wells in relation to ground-water flow systems in the Great Basin region of Nevada and Utah, and adjacent states Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Format: Map Access & Availability: Loading