TY  - RPRT
TI  - Effect of restrictive hunting regulations on canvasbacks and redhead harvest rates and survival
AU  - A. D. Geis
AU  - Walter F. Crissey
PY  - 1969
DO  - 10.2307/3799317
UR  - https://pubs.usgs.gov/publication/5220658
ID  - 5220658
ER  -