@misc{indiciae8b8d61f2461e,
  title = {Comparison of XAD macroporous resins for the concentration of fulvic acid from aqueous solution},
  author = {G. R. Aiken},
  year = {2002},
  doi = {10.1021/ac50047a044},
  url = {https://pubs.usgs.gov/publication/70012270},
  note = {Source identifier: 70012270}
}