TY  - RPRT
TI  - Bird population and habitat surveys in urban areas
AU  - R.M. DeGraaf
AU  - A. D. Geis
AU  - P.A. Healy
PY  - 1991
DO  - /10.1016/0169-2046(91)90017-g
UR  - https://pubs.usgs.gov/publication/5223336
ID  - 5223336
ER  -