@misc{indiciae0cefb4ce895c,
  title = {Bloating clay deposits in southern Maryland},
  author = {Maxwell McMichael Knechtel and Howard P. Hamlin and John W. Hosterman},
  year = {1959},
  doi = {10.3133/ofr5973},
  url = {https://pubs.usgs.gov/publication/ofr5973},
  note = {Source identifier: ofr5973}
}