Twort, A. V., Crowley, F. W., Law, E., & Ratnayaka, D. (1994). Water supply (4th ed.). London: Edward Arnold.
Παραπομπή Chicago StyleTwort, A.C. V., F. W. Crowley, E.M Law, and D.D Ratnayaka. Water Supply. 4th ed. London: Edward Arnold, 1994.
Παραπομπή MLATwort, A.C. V., F. W. Crowley, E.M Law, and D.D Ratnayaka. Water Supply. 4th ed. London: Edward Arnold, 1994.
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