@misc{indiciae579bec44248d,
  title = {Declining scaup populations: A retrospective analysis of long-term population and harvest survey data},
  author = {A. D. Afton and M.G. Anderson},
  year = {2001},
  doi = {10.2307/3803028},
  url = {https://pubs.usgs.gov/publication/70023839},
  note = {Source identifier: 70023839}
}