Singh, G. (1974). Water Supply and Sanitary Engineering. Standard Publishers Distributors.
Lua i Stíl Chicago (17ú heag.)Singh, Gurcharan. Water Supply and Sanitary Engineering. Standard Publishers Distributors, 1974.
Lua MLA (8ú heag.)Singh, Gurcharan. Water Supply and Sanitary Engineering. Standard Publishers Distributors, 1974.
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