@misc{indiciaec2e89cf28267,
  title = {Timing of emplacement of the sapphire-bearing Yogo Dike, Little Belt Mountains, Montana},
  author = {S. S. Harlan},
  year = {1996},
  doi = {10.2113/gsecongeo.91.6.1159},
  url = {https://pubs.usgs.gov/publication/70018594},
  note = {Source identifier: 70018594}
}