The Share of Microorganisms in the Pollution and the Self-purification Processes in Water = [Interakcia mikroorganizmov a znečisťujúcich látok vo vodnom prostredí] / Imrich Daubner et al. . Bratislava :  Veda , 1989 . 91 s . ISBN 80-224-0038-5 . [3, of that borrowed 0]