@misc{indiciae5ea00eee210e,
  title = {Dieldrin and eggshell thickness in ducks.},
  author = {P N Lehner and A Egbert},
  year = {1969},
  doi = {10.1038/2241218a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5358350/},
  note = {Source identifier: 5358350}
}