@misc{indiciae5eb92a55ec0c,
  title = {Location of geophysical field projects, Geologic Division, as of July 1, 1959},
  author = {Geologic Division Staff},
  year = {1960},
  doi = {10.3133/ofr60132},
  url = {https://pubs.usgs.gov/publication/ofr60132},
  note = {Source identifier: ofr60132}
}