@misc{indiciaea600259e1384,
  title = {Effect of restrictive hunting regulations on canvasbacks and redhead harvest rates and survival},
  author = {A. D. Geis and Walter F. Crissey},
  year = {1969},
  doi = {10.2307/3799317},
  url = {https://pubs.usgs.gov/publication/5220658},
  note = {Source identifier: 5220658}
}