@misc{indiciae4b0c4ffc0fd3,
  title = {Countability of sandhill cranes in aerial surveys},
  author = {Douglas H. Johnson and W John Solberg and Courtney L. Amundson},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/70156591},
  note = {Source identifier: 70156591}
}