UNESCO <br/><br/>
International association  for hydrulic research ,1963 vol 1-4 

 - UNESCO  London  1963 
 - 390p.  fig. 
 - Vol  1 .
<br/><br/><label>Nat. Bib. No.: </label>1819 
<br/><br/><label>Universal Decimal Class. No.: </label>532.1  / INT