@misc{indiciaef12eba0a71cf,
  title = {In situ and laboratory geotechnical tests in the Pierre Shale near Hayes, South Dakota},
  author = {T.C. Nichols and D. S. Collins},
  year = {1986},
  doi = {10.3133/ofr86152},
  url = {https://pubs.usgs.gov/publication/ofr86152},
  note = {Source identifier: ofr86152}
}