@misc{indiciae576b4e5fb97c,
  title = {Aliphatic structure of humic acids; a clue to their origin},
  author = {Patrick G. Hatcher and G.E. Maciel and L.W. Dennis},
  year = {1981},
  doi = {10.1016/0146-6380(81)90012-7},
  url = {https://pubs.usgs.gov/publication/70012127},
  note = {Source identifier: 70012127}
}