@misc{indiciae7036015abdbc,
  title = {Structural-group quantitation by CP/MAS 13C NMR measurements of dissolved organic matter from natural waters},
  author = {R.L. Wershaw and George R. Aiken and J. A. Leenheer and J. Tregellas},
  year = {2002},
  doi = {10.1016/b978-1-85573-807-2.50010-2},
  url = {https://pubs.usgs.gov/publication/70198493},
  note = {Source identifier: 70198493}
}