@misc{indiciae8292c3dcade1,
  title = {Bird censuses 116-121: Kentucky bluegrass prairie and mixed prairie I-V},
  author = {Douglas H. Johnson and M.D. Schwartz},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/1001172},
  note = {Source identifier: 1001172}
}