@misc{indiciae31a0b847987f,
  title = {Earth Science Information Center},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1991},
  doi = {10.3133/70039452},
  url = {https://pubs.usgs.gov/publication/70039452},
  note = {Source identifier: 70039452}
}