HEARN, B. C. Geology of the Rattlesnake quadrangle Bearpaw mountains Blaine county, Montana / by B. C. Hearn, W. T. Pecora and W. C. Swadley. -- Washington : United States Government Printing Office, 1964 - 66 p. + map. -- (Geological Survey Bulletin ; 1181-B). Subjects--Topical Terms: GeologíaMontana Universal Decimal Class. No.: 55(786)