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Publikováno v:
BioRisk 5: 31-45
Since 1996 the “Workgroup Odonata in North Rhine-Westphalia” (“AK Libellen NRW”) has built up a data base including about 150.000 data sets concerning the occurrence of dragonfl ies in North RhineWestphalia (NRW). Th is data confi rms an incr