Special Session-Bulgaria 1972  Proceedings 

 - International Commission on Irrigation and Drainage   New Delhi  1972 
 - 180p.  ILL., Fig and Table 
<br/><br/><label>Nat. Bib. No.: </label>3388 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>626.81  / SPE