VERGHESE, B.G...[ET AL.] CONVERTING WATER INTO WEALTH VERGHESE, B.G...[ET AL.] - DELHI KONARK PUBLISHERS PVT LTD 1994 - xx, 137 ISBN: 1-220-0364-8 H Subjects--Topical Terms: WATER Universal Decimal Class. No.: 628.179[540-235.243:282] CON