@misc{indiciaea257da2837e9,
  title = {Origin of two clay-mineral facies of the Potomac Group (Cretaceous) in the Middle Atlantic States},
  author = {Lucy M. Force and George K. Moncure},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/70232934},
  note = {Source identifier: 70232934}
}