Eckel, E. B. (1961). Minerals of Colorado: A 100-year record ; a summary of the first 100 years of published knowledge, including the chief occurences of 445 mineral species. United States Government Printing Office.
Chicago Style (17th ed.) CitationEckel, Edwin Butt. Minerals of Colorado: A 100-year Record ; a Summary of the First 100 Years of Published Knowledge, Including the Chief Occurences of 445 Mineral Species. Washington: United States Government Printing Office, 1961.
MLA (9th ed.) CitationEckel, Edwin Butt. Minerals of Colorado: A 100-year Record ; a Summary of the First 100 Years of Published Knowledge, Including the Chief Occurences of 445 Mineral Species. United States Government Printing Office, 1961.
Warning: These citations may not always be 100% accurate.