@misc{indiciaeed8bc254d429,
  title = {Model for humus in soils and sediments},
  author = {R.L. Wershaw},
  year = {2002},
  doi = {10.1021/es00042a603},
  url = {https://pubs.usgs.gov/publication/70017509},
  note = {Source identifier: 70017509}
}