Earnst, Susan L
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1991: Wildfowl Special Issue No. 1 - SECTION FIVE: HABITATS, FOOD AND FEEDING
Costs and benefits of extended parental care in Tundra Swans Cygnus columbianus columbianus
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1991: Wildfowl Special Issue No. 1 - Preface
The Third International Swan Symposium: a Synthesis
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1991: Wildfowl Special Issue No. 1 - Preface
Comparative demography of the swans: a review
Abstract PDF