@misc{indiciae7f6cf8a9fa99,
  title = {Problems in aerial surveys of waterfowl in eastern Canada},
  author = {E.B. Chamberlain and C.F. Kaczynski},
  year = {1965},
  url = {https://pubs.usgs.gov/publication/ssrw93},
  note = {Source identifier: ssrw93}
}