@misc{indiciae3c3380f1eb05,
  title = {Geological Survey research 1969, Chapter D},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/pp650d},
  url = {https://pubs.usgs.gov/publication/pp650D},
  note = {Source identifier: pp650D}
}