@misc{indiciaeab550578450b,
  title = {Monitoring bird populations with Breeding Bird Survey and atlas data},
  author = {C.S. Robbins and Sam Droege and J.R. Sauer},
  year = {1989},
  url = {https://pubs.usgs.gov/publication/5210420},
  note = {Source identifier: 5210420}
}