expbio.bio.u-szeged.huexpbio.bio.u-szeged.hu/ecology/tiscia/t09/t_9_17.pdfCyclotella has been...
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expbio.bio.u-szeged.huexpbio.bio.u-szeged.hu/ecology/tiscia/t09/t_9_17.pdfCyclotella has been observed at the beginning of the year in every year since 1969 in the Eastern Main Canal