WATER FOR HUMAN NEEDS  Technology and Ecology 

 - Varma.C.V.J.  New Delhi.  1975 
 - 509p.  ILL.,Cht.,Fig and Table 
 - Volume  5 .
<br/><br/><label>Nat. Bib. No.: </label>4117 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>626/628  / WAT