1. The time budget of breeding Northern Shovelers;Afton;Wilson Bull.,1979
2. “Animal Behavior: An Evolutionary Approach,”;Alcock,1979
3. Bird weights and egg weights;Amadon;Auk,1943
4. Bioenergetics of the Nutcracker (Nucifraga caryocatactes) under extremely low temperatures;Andreev;Tool. Zh.,1977
5. The use of nutrient reserves by breeding male Lesser Snow Geese;Ankney;Chen caerulescens caerulescens. Can. J. Zool.,1977