@misc{indiciae79fab1c0983d,
  title = {Black duck-mallard interactions on breeding areas in Maine},
  author = {J. R. Longcore and P.O. Corr and D.G. McAuley},
  year = {1987},
  url = {https://pubs.usgs.gov/publication/5222323},
  note = {Source identifier: 5222323}
}