MELTOFTE H, BLEW J, FRIKKE J, ROSNER H-U & SMIT C (1996) Dutch Ornithological Union: Theme day wading birds (re) counts: Wadden and waterbirds in the Wadden Sea: the results of counts from the Dutch-German-Danish Wadden Sea. LIMOSA 69 (3): 136-137.

Dutch Ornithological Union: Theme day wading birds (re) counts: Wadden and waterbirds in the Wadden Sea: the results of counts from the Dutch-German-Danish Wadden Sea

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