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Guidebook of the Helena area, west-central Montana /
compiled by Richard B. Berg and Ray H. Breuninger ; prepared in cooperation with the Tobacco Root Geological Society, twelfth annual field conference, July 15-18, 1987.

APA Citation

Breuninger, R., Berg, R. B., Tobacco Root Geological Society., Montana Bureau of Mines and Geology. (1987). Guidebook of the Helena area, west-central Montana. [Butte, Mont.]: Montana Bureau of Mines and Geology.

MLA Citation

Breuninger, Ray, Richard B. Berg, Tobacco Root Geological Society, and Montana Bureau of Mines and Geology. Guidebook of the Helena Area, West-central Montana. [Butte, Mont.]: Montana Bureau of Mines and Geology, 1987.

Warning: These citations may not always be complete (especially for serials).