TY  - BOOK
AU  - Carney,Samuel M.
ED  - U.S. Fish and Wildlife Service.
TI  - Species, age, and sex identification of ducks using wing plumage
CY  - Washington
PB  - U.S. Fish and Wildlife Service, 1992.
KW  - Ducks
KW  - Identification
KW  - Local
KW  - Sexing
KW  - Age determination
ER  -