@misc{indiciae82f7a09c66de,
  title = {Application of INEPT nitrogen-15 and silicon-29 nuclear magnetic resonance spectrometry to derivatized fulvic acids},
  author = {K. A. Thorn and D.W. Folan and J.B. Arterburn and M.A. Mikita and P. MacCarthy},
  year = {1989},
  doi = {10.1016/0048-9697(89)90127-7},
  url = {https://pubs.usgs.gov/publication/70015723},
  note = {Source identifier: 70015723}
}