SYSTEMS ANALYSIS OF HYDROLOGIC PROBLEMS,/ 
UNESCO 
 - United Startes:  Unesco,  1970 
 - 452 pages:  illustrations 
<br/><br/><br/>In English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrological problems<br/>System analysis
<br/><br/><label>Universal Decimal Class. No.: </label>556.16