BOERE GC (1994) Dutch Ornithological Union: Study day arctic birds WIWO and NOU: Dutch-Russian cooperation, waterfowl research in the delta of the Lena. LIMOSA 67 (3): 123-124.

Dutch Ornithological Union: Study day arctic birds WIWO and NOU: Dutch-Russian cooperation, waterfowl research in the delta of the Lena

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