@misc{indiciaea1125e9a1675,
  title = {Breeding bird census: 9. Mature tuliptree-oak forest},
  author = {M. O'Brien and B.A. Dowell},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/5222331},
  note = {Source identifier: 5222331}
}