@misc{indiciaedd41b070d8cf,
  title = {An attempt to age mallards using eye lens proteins},
  author = {Charles J. Henny and J. Larry Ludke},
  year = {1974},
  doi = {10.2307/3800209},
  url = {https://pubs.usgs.gov/publication/5220962},
  note = {Source identifier: 5220962}
}