@misc{indiciae990f40c03ad7,
  title = {Geology of the Egnar-Gypsum Valley area, San Miguel and Montrose Counties, Colorado},
  author = {William Lee Stokes and David A. Phoenix},
  year = {1948},
  doi = {10.3133/om93},
  url = {https://pubs.usgs.gov/publication/om93},
  note = {Source identifier: om93}
}