UNESCO <br/><br/>
Status and trends of search in hydrology 1954-74 

 -  1972 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>49578 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>External Dynamic
<br/><br/><label>Dewey Class. No.: </label>H42264, L2