Central Board of Irrigation and Power <br/><br/>
Proceedings of the Symposium on Modernisation of Irrigation Systems, New Delhi 2-4 April, 1979 

 - New Delhi  Central Board of Irrigation an  1979 
 - vi p 
 - Publication No 133 .
<br/><br/><label>Universal Decimal Class. No.: </label>631.587*1