SMIT C & ZEGERS P (1996) Dutch Ornithological Union: Theme day wading birds (re) counts: Wadvogeltellingen in the Dutch Wadden Sea: a comparison of old and new data. LIMOSA 69 (3): 137-138.

Dutch Ornithological Union: Theme day wading birds (re) counts: Wadvogeltellingen in the Dutch Wadden Sea: a comparison of old and new data

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