Rees, E C
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Wildfowl 46 - Progress Reports
Bewick's and Whooper Swans Cygnus columbianus bewickii and C. cygnus: the 1994-95 season
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Wildfowl 47 - Standard Papers
Numbers of Whooper Swans Cygnus cygnus in Iceland, Ireland and Britain in January 1995: results of the international Whooper Swan census
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