@misc{indiciaece661291f68a,
  title = {Controlling for varying effort in count surveys: An analysis of Christmas Bird Count data},
  author = {W.A. Link and J.R. Sauer},
  year = {1999},
  doi = {10.2307/1400592},
  url = {https://pubs.usgs.gov/publication/5223393},
  note = {Source identifier: 5223393}
}