Guidebook of the Helena Area, West-Central Montana: Guidebook for the 12th Annual Field Conference
Richard B. Berg, Ray H. Breuniger 1987 Montana Bureau of Mines and Geology Special Publication 95
Road logs in this volume include coverage of gold deposits, sapphire deposits along the Missouri River, Quaternary geology and faulting in the Helena area and metamorphism and structure along the northern border of the Boulder batholith.