@misc{indiciae971d2c521f90,
  title = {Coal resources of the La Veta area, Huerfano County, Colorado},
  author = {Ross Byron Johnson and James G. Stephens},
  year = {1954},
  doi = {10.3133/coal20},
  url = {https://pubs.usgs.gov/publication/coal20},
  note = {Source identifier: coal20}
}