TY  - RPRT
TI  - Breeding bird populations in the spruce region of the central Appalachians
AU  - Robert E. Stewart
AU  - John W. Aldrich
PY  - 1949
DO  - 10.2307/1932278
UR  - https://pubs.usgs.gov/publication/5220121
ID  - 5220121
ER  -