Cook, E. J. (1994). Anaerobic sludge digestion. Water Pollution Federation.
Chicago-čujuhus (17. p.)Cook, Edmund J. Anaerobic Sludge Digestion. Alexandría: Water Pollution Federation, 1994.
MLA-čujuhus (9. p.)Cook, Edmund J. Anaerobic Sludge Digestion. Water Pollution Federation, 1994.
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