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Numbers and distribution of waterbirds in the Wadden Sea. Results and evaluation of 36 simultaneous counts in the Dutch-German-Danish Wadden Sea 1980-1991

H. Meltofte ; J. Blew ; J. Frikke ; H.U. Rösner ; C.J. Smit | [S.l.] : Common Secretariat for the Cooperation on the Protection of the Wadden Sea CWSS Wilhelmshaven (DEU) & IWRB Slimbridge | 1994

Common Secretariat for the Cooperation on the Protection of the Wadden Sea CWSS Wilhelmshaven (DEU) & IWRB Slimbridge (GBR) 192p 151fig 44tabl* IWRB Publ 34 & Wader Study Group Bull 74

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Forelobig undersogelse af ederfugle i relation til fiskeri af blamuslinger i Vadehavet = Preliminary study of eiders in relation to mussel fishery in the Danish Wadden sea

K. Laursen ; J. Frikke | [S.l.] : Vildtbiologisk Station Kalo | 1987

Vildtbiologisk Station Kalo (DNK) 15p* Rapport 11

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Landsdaekkende optaelling af andefugle og visse havfugle fra flyvemaskine, januar/februar 1987 = Countrywide aerial survey of ducks and some seabirds January/February 1987

K. Laursen ; E.B. Hansen ; J. Frikke ; J. Madsen ; T. Pauli | [S.l.] : Vildtbiologisk Station Kalo | 1987

Vildtbiologisk Station Kalo (DNK) 20p* Rapport 12

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