@misc{indiciae7fa622212571,
  title = {Availability of Earth resources data},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/70039205},
  url = {https://pubs.usgs.gov/publication/70039205},
  note = {Source identifier: 70039205}
}