TY  - RPRT
TI  - Diet and gut morphology of male mallards during winter in North Dakota
AU  - R.E. Olsen
AU  - R. R. Cox
AU  - A. D. Afton
AU  - C.D. Ankney
PY  - 2011
DO  - 10.1675/063.034.0107
UR  - https://pubs.usgs.gov/publication/70035704
ID  - 70035704
ER  -