@misc{indiciae1ccc541c39fe,
  title = {Coal resource occurrence and coal development potential maps of the Pine Tree Quadrangle, Campbell County, Wyoming},
  author = {John M. Wunder},
  year = {1980},
  doi = {10.3133/ofr8042},
  url = {https://pubs.usgs.gov/publication/ofr8042},
  note = {Source identifier: ofr8042}
}