@misc{indiciaea5497c821d9d,
  title = {DDE and organochlorines in eggs of black-crowned night-herons nesting in Colorado and Wyoming},
  author = {L. C. McEwen},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/5221840},
  note = {Source identifier: 5221840}
}