@misc{indiciaede7229088cbc,
  title = {Preliminary geologic map and coal resources of The Gap SW Quadrangle, Campbell County, Wyoming},
  author = {S.L. Grazis},
  year = {1974},
  doi = {10.3133/ofr7424},
  url = {https://pubs.usgs.gov/publication/ofr7424},
  note = {Source identifier: ofr7424}
}