@misc{indiciae00f18fedb522,
  title = {Geology and ground-water resources of the Helena Valley, Montana, with a section on the chemical quality of the water},
  author = {Howard W. Lorenz and Frank Albert Swenson and H. A. Swenson},
  year = {1951},
  doi = {10.3133/cir83},
  url = {https://pubs.usgs.gov/publication/cir83},
  note = {Source identifier: cir83}
}