@misc{indiciae1e353df661b7,
  title = {Lead and PCB's in canvasback ducks: Relationship between enzyme levels and residues in blood},
  author = {Michael P. Dieter and Matthew Perry and Bernard M. Mulhern},
  year = {1977},
  doi = {10.1007/bf02220886},
  url = {https://pubs.usgs.gov/publication/5221379},
  note = {Source identifier: 5221379}
}