Passage of Branta bernicla bernicla on the coast of the German Democratic Republic
Nehls, H.W. (1977). Passage of Branta bernicla bernicla on the coast of the German Democratic Republic, in: Proceedings of first technical meetings on Western Palearctic migratory bird management, Paris, 12-13 December 1977. pp. 33-39
In: (1977). Proceedings of first technical meetings on Western Palearctic migratory bird management, Paris, 12-13 December 1977[s.n.]: Slimbridge, meer
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