TY  - RPRT
TI  - Geology and ground-water resources of the Helena Valley, Montana, with a section on the chemical quality of the water
AU  - Howard W. Lorenz
AU  - Frank Albert Swenson
AU  - H. A. Swenson
PY  - 1951
DO  - 10.3133/cir83
UR  - https://pubs.usgs.gov/publication/cir83
ID  - cir83
ER  -