@misc{indiciaef24d4e0581b9,
  title = {Thirtieth winter bird-population study. 8. Upland tulip-tree-maple-oak forest},
  author = {C.S. Robbins},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/5220862},
  note = {Source identifier: 5220862}
}