Bergantino, R.N.—Hearn, B. C., Jr., Bergantino, R. N., and Porter, K. W., 2002, Geologic map of the Rocky Boy 30' x 60' quadrangle north-central Montana: Montana Bureau of Mines and Geology Open File Report MBMG 451, scale 1:100,000.

Bergantino, R.N. —Vuke, S.M., Wilde, E.M., Bergantino, R.N., Geologic map of the Hardin 30x60 minute quadrangle, Montana: Montana Bureau of Mines and Geology Geologic Map 57, (2000).