@misc{indiciae9962893a596d,
  title = {Geologic map of the Lassen Peak, Chaos Crags, and Upper Hat Creek area, California},
  author = {Robert L. Christiansen and Michael A. Clynne and L.J. Patrick Muffler},
  year = {2002},
  doi = {10.3133/imap2723},
  url = {https://pubs.usgs.gov/publication/i2723},
  note = {Source identifier: i2723}
}