@misc{indiciae37dcc667b808,
  title = {Map showing occurrences of spring-deposited travertine in the conterminous Western United States},
  author = {J. H. Feth and Ivan Barnes},
  year = {1979},
  doi = {10.3133/wri7935},
  url = {https://pubs.usgs.gov/publication/wri7935},
  note = {Source identifier: wri7935}
}