Biotite from selected localities.
USA | |
| Cordua, W. (1998) Minerals of Wisconsin: Rocks and Minerals: 73 (6): 378 - 399 |
| May, E. (1996) Eisenbrey: a structurally complex Proterozoic copper-zinc massive sulfide deposit, Rusk County, Wisconsin: in Berge, G. L., Ed., 1996, Volcanogenic massive sulfide deposits of northern Wisconsin: A commemorative volume: Institute on Lake Superior Geology Proceedings, 42nd Annual Meeting, Cable, WI, v. 42, part 2: 107-128. |