More water for arid lands   Promising technologies    

 - Washington  Naitonal Academy of Sciences International Relations       1974 
 - ix, 153p. Bib at the end of each chapter  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engneering
<br/><br/><label>Dewey Class. No.: </label>X9(D2).1911.N7, L4