HAMMER, M. J. (1996). Water and wastewater technology.-- ed.3. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)HAMMER, Mark J. Water and Wastewater Technology.-- Ed.3. New Jersey: Prentice Hall, 1996.
Lua MLA (9ú heag.)HAMMER, Mark J. Water and Wastewater Technology.-- Ed.3. Prentice Hall, 1996.
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