Kruckenberg, Helmut
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Wildfowl 69 - Short Communications
Large-scale egg-dumping by island nesting Greylag Geese Anser anser: an indication of density-dependent regulation in a breeding population in northwest Lower Saxony, Germany?
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Wildfowl 71 - Review Papers
Sixty years later: Emsland still without wildfowl?
Abstract PDF