1. Map showing metallic mineral resource potential of the Glens Falls 1⁰ x 2⁰ quadrangle, New York, Vermont, and New Hampshire Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Information Services Resource Type: Map Access & Availability: Loading
2. Maps showing metallic mineral districts and mines in the Black Hills, South Dakota and Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Information Services Resource Type: Map Access & Availability: Loading