@misc{indiciae7a185ef1a95d,
  title = {Occurrence and geochemistry of natural gases, Piceance Basin, northwest Colorado},
  author = {Ronald C. Johnson and Dudley D. Rice},
  year = {1990},
  doi = {10.1306/0c9b2399-1710-11d7-8645000102c1865d},
  url = {https://pubs.usgs.gov/publication/70015947},
  note = {Source identifier: 70015947}
}