@misc{indiciaee391cfb2ab74,
  title = {Preliminary reports and maps released by Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1947},
  doi = {10.3133/ofr4728},
  url = {https://pubs.usgs.gov/publication/ofr4728},
  note = {Source identifier: ofr4728}
}