@misc{indiciaec87ceec80053,
  title = {The first 50 years of the North American Breeding Bird Survey},
  author = {John R. Sauer and David Ziolkowski and Keith L. Pardieck and Adam C. Smith and Marie-Anne R. Hudson and Vicente Rodriguez and Humberto Berlanga and Daniel Niven and William A. Link},
  year = {2017},
  doi = {10.1650/condor-17-83.1},
  url = {https://pubs.usgs.gov/publication/70189858},
  note = {Source identifier: 70189858}
}