@misc{indiciae16c7d1b256fd,
  title = {Detection of tannins in modern and fossil barks and in plant residues by high-resolution solid-state 13C nuclear magnetic resonance},
  author = {M. A. Wilson and Patrick G. Hatcher},
  year = {1988},
  doi = {10.1016/0146-6380(88)90145-3},
  url = {https://pubs.usgs.gov/publication/70014364},
  note = {Source identifier: 70014364}
}