@misc{indiciaeb39cd1aedc8f,
  title = {The Breeding Bird Survey: Its first fifteen years, 1965-1979},
  author = {C.S. Robbins and D. Bystrak and P.H. Geissler},
  year = {1986},
  url = {https://pubs.usgs.gov/publication/5230189},
  note = {Source identifier: 5230189}
}