TY  - RPRT
TI  - Synthesis and Evaluation of Avian Populations and Habitat Data for Pennsylvania
AU  - S.H. Anderson
AU  - C.S. Robbins
AU  - J.R. Partelow
AU  - J.S. Weske
PY  - 1981
UR  - https://pubs.usgs.gov/publication/5200053
ID  - 5200053
ER  -