@misc{indiciae416426e5336f,
  title = {Popular publications of the United States Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/7000081},
  url = {https://pubs.usgs.gov/publication/7000081},
  note = {Source identifier: 7000081}
}