@misc{indiciae876147ad7483,
  title = {Geographic variation in Yellow-headed Blackbirds from the northern Great Plains},
  author = {Daniel J. Twedt and William J. Bleier and George M. Linz},
  year = {1994},
  doi = {10.2307/1369112},
  url = {https://pubs.usgs.gov/publication/70203011},
  note = {Source identifier: 70203011}
}