@misc{indiciae21a4d2ea38a1,
  title = {Age Determinations of the San Gabriel anorthosite Massif},
  author = {George Joseph Neuerburg and David Gottfried},
  year = {1954},
  doi = {10.3133/tem709},
  url = {https://pubs.usgs.gov/publication/tem709},
  note = {Source identifier: tem709}
}