SHWAL, HILLEL I. WASTEWATER IRRIGATION IN DEVELOPING COINTRIES / SHWAL, HILLEL I. - [S.N] : THE WORLD BANK ، 1986 - 324 P Subjects--Topical Terms: WATER REUSEWATERHYGIENIC ASPECTSPURIFICATIONDEVELOPING COUNTRIES Dewey Class. No.: 363.728 / S W