@misc{indiciae083b45930a47,
  title = {In situ geomechanics of crystalline and sedimentary rocks; Part IV, continued field testing of the modified U.S. Geological Survey 3-D borehole stress probe},
  author = {Thomas C. Nichols},
  year = {1983},
  doi = {10.3133/ofr83750},
  url = {https://pubs.usgs.gov/publication/ofr83750},
  note = {Source identifier: ofr83750}
}