@misc{indiciaeada7421b022c,
  title = {Preliminary thermal-maturity map of the Cameo and Fairfield or equivalent coal zone in the Piceance Creek Basin, Colorado},
  author = {Vito F. Nuccio and Ronald C. Johnson},
  year = {1983},
  doi = {10.3133/mf1575},
  url = {https://pubs.usgs.gov/publication/mf1575},
  note = {Source identifier: mf1575}
}