Publication
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Korte Berichten Article
Fitis, 17(5), 126-127.January 1981
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Kraansvlak (gebied E) Article
Fitis, 17(3/4), 78-84.January 1981
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Nestkastenverslag 1979 Article
Fitis, 17(2), 54-56.January 1981
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Randstad en Broedvogels Article
Fitis, 17(6), 156-156.January 1981
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Roofvogels A.W. duinen ’79 Article
Fitis, 17(5), 111-114.January 1981
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S.O.V.O.N. Atlasproject Article
Fitis, 17(2), 43-45.January 1981
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Stootvogeltelling 1980 – 1981 Article
Fitis, 17(2), 52-53.January 1981
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Trektellen? Article
Fitis, 17(3/4), 68-75.January 1981