@misc{indiciae9b904af4e2dd,
  title = {Effect of restrictive and liberal hunting regulations on annual survival rates of the mallard in North America},
  author = {Kenneth P. Burnham and David R. Anderson},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/70119877},
  note = {Source identifier: 70119877}
}