@misc{indiciae22d5e25b77ce,
  title = {Preliminary report of extensive gyrfalcon and snowy owl mortality in northern Siberia},
  author = {D. H. Ellis and D.G. Smith},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/5222618},
  note = {Source identifier: 5222618}
}