@misc{indiciae9190a41c2e77, title = {Chitin: 'Forgotten' source of nitrogen: From modern chitin to thermally mature kerogen: Lessons from nitrogen isotope ratios}, author = {A. Schimmelmann and R. P. Wintsch and M. D. Lewan and M. J. DeNiro}, year = {2009}, doi = {10.1021/bk-1998-0707.ch013}, url = {https://pubs.usgs.gov/publication/70020401}, note = {Source identifier: 70020401} }