@misc{indiciae0e881eea554c,
  title = {Structural characteristics of fulvic acids from Continental Shelf sediments},
  author = {Patrick G. Hatcher and Irving A. Breger and M.A. Mattingly},
  year = {1980},
  doi = {10.1038/285560a0},
  url = {https://pubs.usgs.gov/publication/70012082},
  note = {Source identifier: 70012082}
}