@misc{indiciae580813a75a7f,
  title = {Bird population and habitat surveys in urban areas},
  author = {R.M. DeGraaf and A. D. Geis and P.A. Healy},
  year = {1991},
  doi = {/10.1016/0169-2046(91)90017-g},
  url = {https://pubs.usgs.gov/publication/5223336},
  note = {Source identifier: 5223336}
}