@misc{indiciae12e72f1c2e5a,
  title = {Trace organics in surface waters.},
  author = {D W Ryckman and J W Irvin and R H Young},
  year = {1967},
  url = {https://pubmed.ncbi.nlm.nih.gov/6021840/},
  note = {Source identifier: 6021840}
}