@misc{indiciaee5c617d242c8,
  title = {Age-class determination of canvasbacks},
  author = {Jerome R. Serie and David L. Trauger and Harold A. Doty and David E. Sharp},
  year = {1982},
  doi = {10.2307/3808222},
  url = {https://pubs.usgs.gov/publication/1001268},
  note = {Source identifier: 1001268}
}