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    Man-made changes in some Dutch moorland pools, as reflected by historical and recent data about diatoms and macrophytes \ Internationale Revue der gesamten Hydrobiologie [Artikel]
    Dam, H. van \ Kooyman-van Blokland, H. \ 1978
    The diatoms of plankton samples taken between 1916 and 1929 and in 1975 from shallow pools, which were originally oligotrophic, are compared. Data about the past and present distribution of macrophytes were gathered from the literature and by field s ...
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