@misc{indiciae3539f73cdce7,
  title = {Monitoring bird population trends in North America},
  author = {C.S. Robbins and D. Bystrak and P.H. Geissler},
  year = {1983},
  url = {https://pubs.usgs.gov/publication/5210312},
  note = {Source identifier: 5210312}
}