@misc{indiciae8503241f7642,
  title = {Toxicity of six heterocyclic nitrogen compounds to Daphnia pulex},
  author = {Cynthia M. Perry and Stephen B. Smith},
  year = {1988},
  doi = {10.1007/bf02021007},
  url = {https://pubs.usgs.gov/publication/1000540},
  note = {Source identifier: 1000540}
}