1. Bedrock geologic map of the Black Hills 1:24,000 quadrangle, Nevada [cartographic material] Yale Public content 1986. 2002-06-01T04:00:00Z. 2023-10-31T03:01:42Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. cartographic image. Public. Nevada.