@misc{indiciae4a6f94ed3340,
  title = {Geological Survey research 1972, Chapter A},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/pp800a},
  url = {https://pubs.usgs.gov/publication/pp800A},
  note = {Source identifier: pp800A}
}