III [i.e. tercer] World Congress on Water Resources =  III [i.e. tercer] Congreso mundial sobre aprovechamientos hidraúlicos / 
International Water Resources Association 
 - México :  International Water Reaources Association,  1979 
 - 8 v. ;  27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abastecimiento de agua---Congresos.<br/>Desarrollo de recursos de agua---Congresos.
<br/><br/><label>LC Class. No.: </label>TC 401  / W67.1979