@misc{indiciae7eb32365b7c6,
  title = {A double-observer method to estimate detection rate during aerial waterfowl surveys},
  author = {M.D. Koneff and J. Andrew Royle and M.C. Otto and J.S. Wortham and J.K. Bidwell},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/5224909},
  note = {Source identifier: 5224909}
}