@misc{indiciae9832d18b2333,
  title = {Eggshell thinning and residues in mallards one year after DDE exposure},
  author = {M. A. Haegele and Rick H. Hudson},
  year = {1974},
  doi = {10.1007/bf02047100},
  url = {https://pubs.usgs.gov/publication/5221215},
  note = {Source identifier: 5221215}
}