@misc{indiciaeadafa28910d1,
  title = {Map showing outcrops of ash-flow tuffs, Basin and Range Province and vicinity, Trans-Pecos Texas},
  year = {1983},
  doi = {10.3133/wri834121e},
  url = {https://pubs.usgs.gov/publication/wri834121E},
  note = {Source identifier: wri834121E}
}