@misc{indiciae132e2ffbb578,
  title = {Chemical analyses of coal and coal-associated rock samples from the Coalmont Formation, McCallum and Coalmont areas, North Park, Jackson County, Colorado},
  author = {Joseph R. Hatch and Dawn Madden and Ronald H. Affolter},
  year = {1979},
  doi = {10.3133/ofr791099},
  url = {https://pubs.usgs.gov/publication/ofr791099},
  note = {Source identifier: ofr791099}
}