1. Geologic map of the Russell quadrangle, Costilla County, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Resource Type: Map Access & Availability: Loading
2. Geologic map of the Arivaca quadrangle and vicinity, Pima and Santa Cruz counties, Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Resource Type: Map Access & Availability: Loading