@misc{indiciaedc8be41b6896,
  title = {Environmental pollutants and eggshell thinning in the black-crowned night heron},
  author = {H. M. Ohlendorf and Erwin E. Klaas and T. E. Kaiser},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/5210208},
  note = {Source identifier: 5210208}
}