@misc{indiciae1c36191cf504,
  title = {The National Center of the U.S. Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/70039550},
  url = {https://pubs.usgs.gov/publication/70039550},
  note = {Source identifier: 70039550}
}