@misc{indiciae94bcae7bba07,
  title = {In Situ geomechanics of crystalline and sediment rocks; Part VIII, Anisotropic characterization of Pierre Shale; preliminary results},
  author = {H.S. Swolfs and T. C. Nichols},
  year = {1987},
  doi = {10.3133/ofr87417},
  url = {https://pubs.usgs.gov/publication/ofr87417},
  note = {Source identifier: ofr87417}
}