@misc{indiciae90305883339e,
  title = {Contaminant levels in colonial waterbirds from Green Bay and Lake Michigan, 1975–80},
  author = {G. H. Heinz and T.C. Erdman and S. D. Haseltine and C. Stafford},
  year = {1985},
  doi = {10.1007/bf00394064},
  url = {https://pubs.usgs.gov/publication/5222029},
  note = {Source identifier: 5222029}
}