Tobacco Root Geological Society. Field Conference, Berg, R. B., & Breuninger, R. (1987). Guidebook of the Helena area, west-central Montana. Montana Bureau of Mines and Geology, Montana College of Mineral Science and Technology.
Cita Chicago Style (17a ed.)Tobacco Root Geological Society. Field Conference, Richard B. Berg, y Ray Breuninger. Guidebook of the Helena Area, West-central Montana. Butte, Mont.: Montana Bureau of Mines and Geology, Montana College of Mineral Science and Technology, 1987.
Cita MLA (8a ed.)Tobacco Root Geological Society. Field Conference, et al. Guidebook of the Helena Area, West-central Montana. Montana Bureau of Mines and Geology, Montana College of Mineral Science and Technology, 1987.
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