@misc{indiciae93a613a816d5,
  title = {Winter bird-population study. 11. Upland oak forest, pine-oak forest, bottomland forest and forest clearing},
  author = {R. E. Stewart},
  year = {1948},
  url = {https://pubs.usgs.gov/publication/5222503},
  note = {Source identifier: 5222503}
}