TY  - RPRT
TI  - Tundra swan research needs on the Upper Mississippi River
AU  - K.P. Kenow
AU  - J.M. Nissen
AU  - R. Drieslein
AU  - E.M. Thorson
PY  - 2004
UR  - https://pubs.usgs.gov/publication/85639
ID  - 85639
ER  -