@misc{indiciae4c7af0c5ef28,
  title = {Glacial chronology of the Southern Rocky Mountains},
  author = {L.L. Ray},
  year = {1940},
  doi = {10.1130/gsab-51-1851},
  url = {https://pubs.usgs.gov/publication/70206708},
  note = {Source identifier: 70206708}
}