Não informado. (1981). Water engineering and management. Scranton Gillette Communications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Water Engineering and Management. Des Plaines, Ill: Scranton Gillette Communications, 1981.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Water Engineering and Management. Scranton Gillette Communications, 1981.
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