@misc{indiciae600893f9eee1,
  title = {Interpreting ground conditions from geologic maps},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1949},
  doi = {10.3133/cir46},
  url = {https://pubs.usgs.gov/publication/cir46},
  note = {Source identifier: cir46}
}