@misc{indiciae8e243a79b306,
  title = {Experimental engineering-geologic and environmental-geologic maps of the conterminous United States},
  author = {Dorothy H. Radbruch-Hall and Kathleen Edwards and Raymond M. Batson},
  year = {1987},
  doi = {10.3133/b1610},
  url = {https://pubs.usgs.gov/publication/b1610},
  note = {Source identifier: b1610}
}