QASIM, S. R. (1985). Wastewater Treatment Plants Planning Design And Operation Syed R. Qasim. CBS College Publishing.
Lua i Stíl Chicago (17ú heag.)QASIM, Syed R. Wastewater Treatment Plants Planning Design And Operation Syed R. Qasim. CBS College Publishing, 1985.
Lua MLA (8ú heag.)QASIM, Syed R. Wastewater Treatment Plants Planning Design And Operation Syed R. Qasim. CBS College Publishing, 1985.
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