@misc{indiciae51c004afc9fc,
  title = {United States Geological Survey Yearbook, fiscal year 1991},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1992},
  doi = {10.3133/70039039},
  url = {https://pubs.usgs.gov/publication/70039039},
  note = {Source identifier: 70039039}
}