@misc{indiciae9a796c74bfec,
  title = {Educational materials from the U.S. Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2001},
  doi = {10.3133/fs04401\_2001},
  url = {https://pubs.usgs.gov/publication/fs04401\_2001},
  note = {Source identifier: fs04401\_2001}
}