グラニット郡 (モンタナ州)
Loen, J.S., M.J. Blaskowski, and J.E. Elliott. (1989). Geology and mineral deposits of the Miners Gulch Area, Granite County, Montana [U.S. Geological Survey Bulletin 1791]. Washington, D.C.: U.S. Department of the Interior, U.S. Geological Survey.