@misc{indiciae22df7f23bb7f,
  title = {Geological Survey research 1973},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/pp850},
  url = {https://pubs.usgs.gov/publication/pp850},
  note = {Source identifier: pp850}
}