@misc{indiciae7478421dff72,
  title = {Effects of dietary mercury and lead on eggshell thickness in mallards},
  author = {M. A. Haegele and R. K. Tucker and R. H. Hudson},
  year = {1974},
  doi = {10.1007/bf01685020},
  url = {https://pubs.usgs.gov/publication/5221214},
  note = {Source identifier: 5221214}
}