@misc{indiciae3c981d91e5a7,
  title = {Location of geologic field projects, Geologic Division, as of July 1, 1959},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1960},
  doi = {10.3133/ofr60131},
  url = {https://pubs.usgs.gov/publication/ofr60131},
  note = {Source identifier: ofr60131}
}