@misc{indiciae2db3519c1018,
  title = {Preliminary geologic map of western San Juan basin, San Juan and McKinley Counties, New Mexico},
  author = {R. B. O'Sullivan and E. C. Beaumont},
  year = {1957},
  doi = {10.3133/om190},
  url = {https://pubs.usgs.gov/publication/om190},
  note = {Source identifier: om190}
}