@misc{indiciae3e4fde0b2bbb,
  title = {Geologic map of the El Malpais Instant Study Area and adjacent areas, Valencia County, New Mexico},
  author = {C. H. Maxwell},
  year = {1981},
  doi = {10.3133/mf1375a},
  url = {https://pubs.usgs.gov/publication/mf1375A},
  note = {Source identifier: mf1375A}
}