@misc{indiciaefd2766110d6f,
  title = {Post-breeding activities of mallards and wood ducks in north-central Minnesota},
  author = {D.S. Gilmer and R.E. Kirby and I.J. Ball and J. H. Riechmann},
  year = {1977},
  doi = {10.2307/3800504},
  url = {https://pubs.usgs.gov/publication/1001643},
  note = {Source identifier: 1001643}
}