Granger, H. C.; McKay, E. J.; Mattick, Robert E.; Patten, Lowell L. & McIlroy, Paul. Mineral Resources of the Glacier Primitive Area, Wyoming, report, 1971; (https://digital.library.unt.edu/ark:/67531/metadc958039/m1/4/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .