HETEROCYSTS (MICROBIOLOGY)
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BTMORPHOLOGY AND CYTOLOGY OF MICROORGANISMS (MICROBIOLOGY)
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UDC579.239
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Descriptor GERHETEROCYSTEN (MIKROBIOLOGIE)
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Descriptor ENGHETEROCYSTS (MICROBIOLOGY)
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Descriptor FREHÉTÉROCYSTES (MICROBIOLOGIE)
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RTNITROGEN FIXATION (MICROBIOLOGY)