Columbite-(Fe)-Columbite-(Mn) Series from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| |
| R&M 75:3 pp 156-169; American Mineralogist, Volume 73, pages 324-337, 1988; U.S. Geological Survey Professional Paper 297 |
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |