@misc{indiciae3338b6af175a,
  title = {Cross sections showing coal stratigraphy of the southeastern Powder River basin, Wyoming},
  author = {F. W. Pierce and E. A. Johnson and C. L. Molnia and W. R. Sigleo},
  year = {1990},
  doi = {10.3133/i1959b},
  url = {https://pubs.usgs.gov/publication/i1959B},
  note = {Source identifier: i1959B}
}