@misc{indiciaec627cda8019c,
  title = {Membrane-micelle model for humus in soils and sediments and its relation to humification},
  author = {R.L. Wershaw},
  year = {1992},
  doi = {10.3133/ofr91513},
  url = {https://pubs.usgs.gov/publication/ofr91513},
  note = {Source identifier: ofr91513}
}