@misc{indiciaeaa38de5dd5ac,
  title = {Ammonite faunas of the Sarten Sandstone (Cretaceous), Luna County, New Mexico},
  author = {William Aubrey Cobban},
  year = {1987},
  doi = {10.3133/b1641b},
  url = {https://pubs.usgs.gov/publication/b1641B},
  note = {Source identifier: b1641B}
}