Singh, G. (1974). Water Supply and Sanitary Engineering. Standard Publishers Distributors.
Dyfyniad Arddull ChicagoSingh, Gurcharan. Water Supply and Sanitary Engineering. Standard Publishers Distributors, 1974.
Dyfyniad MLASingh, Gurcharan. Water Supply and Sanitary Engineering. Standard Publishers Distributors, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.