@misc{indiciae5c179e1ebfef,
  title = {Geology of the Marysville mining district, Montana: A study of igneous intrusion and contact metamorphism},
  author = {Joseph Barrell},
  year = {1907},
  doi = {10.3133/pp57},
  url = {https://pubs.usgs.gov/publication/pp57},
  note = {Source identifier: pp57}
}