TY  - RPRT
TI  - Age-class determination of canvasbacks
AU  - Jerome R. Serie
AU  - David L. Trauger
AU  - Harold A. Doty
AU  - David E. Sharp
PY  - 1982
DO  - 10.2307/3808222
UR  - https://pubs.usgs.gov/publication/1001268
ID  - 1001268
ER  -