@misc{indiciae09a2a60e3ace,
  title = {The Bowdoin dome, Montana, a possible reservoir of oil or gas},
  author = {A. J. Collier},
  year = {1918},
  doi = {10.3133/b661e},
  url = {https://pubs.usgs.gov/publication/b661E},
  note = {Source identifier: b661E}
}