@misc{indiciaee81f7b18bb80,
  title = {Stratigraphic cross section showing upper Paleocene coal-bearing rocks of the Tongue River member of the Fort Union Formation in the Piney Canyon SE Quadrangle, Weston County, southeastern Powder River basin, Wyoming},
  author = {E. A. Johnson and F. W. Pierce and W. R. Sigleo},
  year = {1990},
  doi = {10.3133/i2012},
  url = {https://pubs.usgs.gov/publication/i2012},
  note = {Source identifier: i2012}
}