1. Geologic map of the Scottsbluff 1⁰ x 2⁰ quadrangle, Nebraska and Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : U.S. Geological Survey Information Services [distributor]. Resource Type: Map Access & Availability: Loading
2. Geologic map of Morrill County, Nebraska Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : U.S. Geological Survey Information Services [distributor]. Resource Type: Map Access & Availability: Loading