@misc{indiciaeca38a4385cde,
  title = {The role of citizen science in bird conservation: The Christmas Bird Count and Breeding Bird Survey},
  author = {John R. Sauer and Gregory S. Butcher},
  year = {2014},
  url = {https://pubs.usgs.gov/publication/70148080},
  note = {Source identifier: 70148080}
}