@misc{indiciaedee70021b3f7,
  title = {Geology of the Three Forks quadrangle, Montana, with sections on petrography of igneous rocks},
  author = {G. D. Robinson and Henry Frank Barnett},
  year = {1963},
  doi = {10.3133/pp370},
  url = {https://pubs.usgs.gov/publication/pp370},
  note = {Source identifier: pp370}
}