@misc{indiciaea6b546000fef,
  title = {Age determinations on some rocks from the Boulder batholith and other batholiths of Western Montana},
  author = {Randolph W. Chapman and David Gottfried and Claude L. Waring},
  year = {1955},
  doi = {10.1130/0016-7606(1955)66[607:adosrf]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70216133},
  note = {Source identifier: 70216133}
}