@misc{indiciaef8489ee62ad7,
  title = {Twenty-eighth winter bird-population study. 13. Upland tulip-tree-maple-oak forest},
  author = {C.S. Robbins},
  year = {1975},
  url = {https://pubs.usgs.gov/publication/5220877},
  note = {Source identifier: 5220877}
}