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By: Aiken, Charles Edward Howard, - Colorado College.Edition:Publication info: Colorado Springs, Published by the authority of the Board of Trustees of Colorado College, 1914Volume:Series:Holding Institution: Cornell University LibrarySubjects: Birds Colorado El Paso CountyBHL Collections:
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By: Frondel, Clifford,Edition:Publication info: New York City, The American Museum of Natural History, [1936]Volume: no. 829 (1936)Series:Holding Institution: American Museum of Natural History LibrarySubjects: 54.8,5 Chester County Colorado Crystal growth Crystallography Dislocations in crystals El Paso County Minerals Pennsylvania Pyrites QuartzBHL Collections: