@misc{indiciaeb1622d6a1b32,
  title = {Chemical analyses of lignite from the Sentinel Butte Member of the Paleocene Fort Union Formation, North Beulah EMRIA study site, Mercer County, North Dakota},
  author = {R.H. Affolter and M.A. Kirschbaum},
  year = {1982},
  doi = {10.3133/ofr82131},
  url = {https://pubs.usgs.gov/publication/ofr82131},
  note = {Source identifier: ofr82131}
}