@misc{indiciae625413c0fc09,
  title = {Presence and potential significance of aromatic-ketone groups in aquatic humic substances},
  author = {J.A. Leenheer and M. A. Wilson and Ronald L. Malcolm},
  year = {1987},
  doi = {10.1016/0146-6380(87)90038-6},
  url = {https://pubs.usgs.gov/publication/70014891},
  note = {Source identifier: 70014891}
}