TY  - RPRT
TI  - Comparative productivity of American black ducks and mallards breedings on the Chesapeake Bay
AU  - D.G. Krementz
AU  - Daniel B. Stotts
AU  - Vernon D. Stotts
AU  - G.W. Pendleton
PY  - 1997
UR  - https://pubs.usgs.gov/publication/5211116
ID  - 5211116
ER  -