@misc{indiciaeb76f9e8f8164,
  title = {Appendix A—Progress report of the subcommittee on permeability},
  author = {Walter B. Langbein},
  year = {2014},
  doi = {10.1029/tr025i005p00721},
  url = {https://pubs.usgs.gov/publication/70215118},
  note = {Source identifier: 70215118}
}