@misc{indiciaee2850de0b010,
  title = {Effects of harvest restrictions on black duck harvest and populations trends},
  author = {J.R. Serie and R.E. Trost and J.R. Sauer},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/5211121},
  note = {Source identifier: 5211121}
}