ENS BJ (1995) Remarkable reports: Fleet, D.M. ... (et al.), Breeding birds in the wadden Sea 1991, 1994. LIMOSA 68 (3): 132-132.
FLEET D. M., FRIKKE J., SUDBECK P. & VOGEL R. L. 1994. Breeding Birds in the Wadden Sea 1991. Wadden Sea Ecosystem No. 1. Common Wadden Sea Secretariat & Trilateral Monitoring and Assessment Group, Wilhelmshaven.
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