@misc{indiciae91df7481f7db,
  title = {Enzyme changes in mallard ducks fed iron or lead shot},
  author = {R.S. Rozman and L. N. Locke and S.F. McClure},
  year = {1974},
  doi = {10.2307/1589111},
  url = {https://pubs.usgs.gov/publication/5221202},
  note = {Source identifier: 5221202}
}