@misc{indiciaed195211ad158,
  title = {Geological Survey research 1972},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/pp800d},
  url = {https://pubs.usgs.gov/publication/pp800D},
  note = {Source identifier: pp800D}
}