TY  - RPRT
TI  - Calculations on the extent of spruce budworm control by insectivorous birds
AU  - J.L. George
AU  - R.T. Mitchell
PY  - 1948
DO  - 10.1093/jof/46.6.454
UR  - https://pubs.usgs.gov/publication/5221336
ID  - 5221336
ER  -