@misc{indiciae8971cfcc5004,
  title = {Stratigraphy of reference sections in the Popotosa Formation, Socorro County, New Mexico},
  author = {Sigrid Asher-Bolinder},
  year = {1988},
  doi = {10.3133/b1800},
  url = {https://pubs.usgs.gov/publication/b1800},
  note = {Source identifier: b1800}
}