@misc{indiciae177d9bcc4124,
  title = {Geological survey research 1974},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/pp900},
  url = {https://pubs.usgs.gov/publication/pp900},
  note = {Source identifier: pp900}
}