@misc{indiciae20609cf2f77b,
  title = {Birds of North America - A Guide to Field Identification},
  author = {C.S. Robbins and B. Bruun and H.S. Zim},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/5200121},
  note = {Source identifier: 5200121}
}