@misc{indiciae79d7348d63cb,
  title = {Breeding bird populations in the spruce region of the central Appalachians},
  author = {Robert E. Stewart and John W. Aldrich},
  year = {1949},
  doi = {10.2307/1932278},
  url = {https://pubs.usgs.gov/publication/5220121},
  note = {Source identifier: 5220121}
}