@misc{indiciaefd2ba5fee84b,
  title = {Thirtieth winter bird-population study. 7. Hickory-oak-ash floodplain forest},
  author = {C.S. Robbins},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/5220861},
  note = {Source identifier: 5220861}
}