@misc{indiciaec19409949b45,
  title = {Simplified procedure for examining charcoal specimens for identification},
  author = {L. Leney and R.W. Casteel},
  year = {1975},
  doi = {10.1016/0305-4403(75)90035-7},
  url = {https://pubs.usgs.gov/publication/70010221},
  note = {Source identifier: 70010221}
}