@misc{indiciae547f78325d3c,
  title = {Paleogeography and the Late Cretaceous of the Western Interior of middle North America; coal distribution and sediment accumulation},
  author = {Laura N. Robinson Roberts and Mark A. Kirschbaum},
  year = {1995},
  doi = {10.3133/pp1561},
  url = {https://pubs.usgs.gov/publication/pp1561},
  note = {Source identifier: pp1561}
}