@misc{indiciae663c7a5a8cd3,
  title = {DDE thins eggshells and lowers reproductive success of captive black ducks},
  author = {J. R. Longcore and F. B. Samson and T.W. Whittendale},
  year = {1971},
  doi = {10.1007/bf01796852},
  url = {https://pubs.usgs.gov/publication/5221237},
  note = {Source identifier: 5221237}
}