Food of Game Ducks In the United States and Canada
Martin, A.C. and F.M. Uhler
Life History of the Blue Goose: Chen caerulescens (Linnaeus)
Soper, J. Dewey
The Ring-Necked Duck in the Northeast
Mendall, Howard L.
Waterfowl and Wetlands an Integrated Review
Bookhout, Theodore A.
The Barnacle Goose
Black, Jeffery; Jouke Prop and Kjell Larsson
Wisconsin Pheasant Populations
Buss, Irven O.
Food Habits of Migratory Ducks in Illinois
Anderson, Harry G.
The Canvasback on a Prairie Marsh
HOCHBAUM, H. Albert.
The Duck Sickness In Utah
Sex Ratios and Age Ratios in North American Ducks: Volume 27, Article 6
Bellrose, Frank C.; et al
Canada Geese of the Mississippi Flyway. With Special Reference to an Illinois Flock
Hanson, Harold C.; Smith, Robert H.
Black Duck Spring
Wright, Bruce S.