@misc{indiciaee3782779dba4,
  title = {Potentiometric titration and equivalent weight of humic acid},
  author = {A. M. Pommer and Irving A. Breger},
  year = {1960},
  doi = {10.1016/0016-7037(60)90136-8},
  url = {https://pubs.usgs.gov/publication/70010642},
  note = {Source identifier: 70010642}
}