Proceedings of the United Nations Interregional seminar on ore concentration in water short areas :   held in New York, 14-25 February, 1966 / 

 - New York :      UN ,  1968 
 - iii, 342p. ;  30 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral resources
<br/><br/><label>Dewey Class. No.: </label>333.8  / UN