The Uranium-Bearing Nickel-Cobalt-Native Silver Deposits in the Black Hawk District, Grant County, New Mexico, report, September 1953; (https://digital.library.unt.edu/ark:/67531/metadc1050692/m1/1/: accessed June 1, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .