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Upflow Anaerobic Sludge Blanket Reactor

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→‎References and external links: spam removal

==References and external links==

* [http://www.bodybuildingrevealed.com/'''body building''']

* Crites, R. and Tchobanoglous, G. (1998). Small and decentralized wastewater management systems. WCB and McGraw-Hill, New York, USA. (Short overview.)

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