Workshop on Research & development needs water supply and sanitation decade (1981-1990) 
/ National Development Engineering Research Institute 
 - Nagpur:     National Development Engineering Research Institute,                   1980 
 - 60p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language
<br/><br/><label>Subjects--Index Terms: </label>Water 
<br/><br/><label>Universal Decimal Class. No.: </label>R 628(082.2)"1981-1991"  / M0