Von Sperling, M. (2007). Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing.
Tohutoru Kātū Chicago (17th ed.)Von Sperling, Marcos. Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing, 2007.
Tohutoro MLA (9th ed.)Von Sperling, Marcos. Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing, 2007.
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