@misc{indiciae5aa2e82d3100,
  title = {Geologic field-trip guide to Mount Shasta Volcano, northern California},
  author = {Robert L. Christiansen and Andrew T. Calvert and Timothy L. Grove},
  year = {2017},
  doi = {10.3133/sir20175022k3},
  url = {https://pubs.usgs.gov/publication/sir20175022K3},
  note = {Source identifier: sir20175022K3}
}