@misc{indiciaeac395a12466f,
  title = {Large fracture experimentation},
  author = {Carl H. Sondergeld and Hartmut A. Spetzler},
  year = {1981},
  doi = {10.3133/ofr81941},
  url = {https://pubs.usgs.gov/publication/ofr81941},
  note = {Source identifier: ofr81941}
}