@misc{indiciae3c9fccbf9b43,
  title = {Northern bobwhite, gray partridge, and ring-necked pheasant population trends (1966-1988) from the North American Breeding Bird Survey},
  author = {Sam Droege and J.R. Sauer},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/5210631},
  note = {Source identifier: 5210631}
}