@misc{indiciae493e5028895b,
  title = {Distribution patterns during winter and fidelity to wintering areas of American black ducks},
  author = {Duane R. Diefenbach and James D. Nichols and James E. Hines},
  year = {1988},
  doi = {10.1139/z88-221},
  url = {https://pubs.usgs.gov/publication/5220001},
  note = {Source identifier: 5220001}
}