@misc{indiciae10247547f0dc,
  title = {A review of bufflehead sex and age criteria with notes on weights},
  author = {Charles J. Henny and J.L. Carter and Barbara J. Carter},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/5221684},
  note = {Source identifier: 5221684}
}