@misc{indiciae0e71e42d305b,
  title = {Toxicity of 33 NCS to freshwater fish and sea lamprey},
  author = {Leif L. Marking and Everett L. King and Charles R. Walker and John H. Howell},
  year = {1970},
  url = {https://pubs.usgs.gov/publication/70171176},
  note = {Source identifier: 70171176}
}