TY  - RPRT
TI  - Declining scaup populations: A retrospective analysis of long-term population and harvest survey data
AU  - A. D. Afton
AU  - M.G. Anderson
PY  - 2001
DO  - 10.2307/3803028
UR  - https://pubs.usgs.gov/publication/70023839
ID  - 70023839
ER  -