International legend for Hydrogeological maps 

 - Paris  Unesco France         1983 
 - 51p.  cm. 
<br/><br/><label>Standard No.: </label>29753 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOLOGY
<br/><br/><label>Dewey Class. No.: </label>H4224.5, N3