[Distribution of vitamin B 12 producing bacteria in fresh-water muds of the Danube].
D001419:Bacteria / Q000378:metabolism*; D012621:Seasons; D012988:Soil Microbiology; D014455:Ukraine; D014805:Vitamin B 12 / Q000096:biosynthesis*; D014871:Water Microbiology
D014805:Vitamin B 12
Poshyrennia bakterii--produtsentiv vitaminu B 12 u prisnovodnykh mulakh hyrla dunaiu.