TY  - RPRT
TI  - Survival and band recovery rates of sympatric American black ducks and mallards
AU  - James D. Nichols
AU  - Holliday H. Obrecht
AU  - James E. Hines
PY  - 1987
DO  - 10.2307/3801730
UR  - https://pubs.usgs.gov/publication/5221533
ID  - 5221533
ER  -