Shea, Ruth
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1991: Wildfowl Special Issue No. 1 - SECTION TWO: POPULATION STUDIES
Demographic analyses of a Trumpteter Swan Cygnus cygnus buccinator population in Western USA
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1991: Wildfowl Special Issue No. 1 - SECTION SEVEN: MANAGEMENT AND CONSERVATION
Trumpeter Swan Cygnus buccinator range expansion programs in the northern Rocky Mountains, USA
Abstract PDF