@misc{indiciaecd12fb4aa1ad,
  title = {Geochemical data on selected coal beds, Raton coal fields, Colfax County, New Mexico},
  author = {C. L. Pillmore and Joseph R. Hatch},
  year = {1976},
  doi = {10.3133/ofr76542},
  url = {https://pubs.usgs.gov/publication/ofr76542},
  note = {Source identifier: ofr76542}
}