TY  - RPRT
TI  - Feeding ecology of mallards wintering in Nebraska
AU  - Dennis G. Jorde
AU  - Gary L. Krapu
AU  - R.D. Crawford
PY  - 1983
DO  - 10.2307/3808163
UR  - https://pubs.usgs.gov/publication/1001524
ID  - 1001524
ER  -