@misc{indiciae52d90bc36f26,
  title = {Prehunting season banding of mallards and black ducks: Progress report, 1959 and 1960},
  author = {R.I. Smith and A. D. Geis},
  year = {1961},
  url = {https://pubs.usgs.gov/publication/5230013},
  note = {Source identifier: 5230013}
}