@misc{indiciae50f867feeafc,
  title = {Review of Gulls simplified: A comparative approach to identification by Pete Dunne and Kevin T. Karlson},
  author = {Garrett J. MacDonald},
  year = {2019},
  url = {https://pubs.usgs.gov/publication/70250114},
  note = {Source identifier: 70250114}
}