@misc{indiciaea260e0737fba,
  title = {Evaluation of waterfowl conservation under the North American Waterfowl Management Plan},
  author = {B. Kenneth Williams and M.D. Koneff and David A. Stith},
  year = {1999},
  doi = {10.2307/3802628},
  url = {https://pubs.usgs.gov/publication/70021782},
  note = {Source identifier: 70021782}
}