@misc{indiciaeeddafd28800e,
  title = {The Yampa Bed — A regionally extensive tonstein in the Williams Fork Formation, northwestern Piceance Creek and southern Sand Wash Basins, Colorado},
  author = {Michael E. Brownfield and Edward A. Johnson},
  year = {2008},
  doi = {10.3133/sir20085033},
  url = {https://pubs.usgs.gov/publication/sir20085033},
  note = {Source identifier: sir20085033}
}