@misc{indiciaea2bc818a2b2a,
  title = {Igneous rocks of the Highwood Mountains, Montana: Part II. The Extrusive Rocks},
  author = {E. S. Larsen},
  year = {1941},
  doi = {10.1130/gsab-52-1733},
  url = {https://pubs.usgs.gov/publication/70220021},
  note = {Source identifier: 70220021}
}