@misc{indiciae006cca22845b,
  title = {15N and13C NMR investigation of hydroxylamine-derivatized humic substances},
  author = {K. A. Thorn and J.B. Arterburn and M.A. Mikita},
  year = {2002},
  doi = {10.1021/es00025a011},
  url = {https://pubs.usgs.gov/publication/70016905},
  note = {Source identifier: 70016905}
}