@misc{indiciae0761df8c3b10,
  title = {Delineation of Tundra Swan Cygnus c. columbianus populations in North America: geographic boundaries and interchange},
  author = {Craig R. Ely and William J.L. Sladen and Heather M. Wilson and Susan E. Savage and Kristine M. Sowl and Bill Henry and Mike Schwitters and James Snowden},
  year = {2014},
  url = {https://pubs.usgs.gov/publication/70148012},
  note = {Source identifier: 70148012}
}