Riley, C.M. <br/><br/>
Our mineral resources  an elementry textbook in economic geology 

 - New York  John Wiley & Sons  1959 
 - 338p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Mineral resources
<br/><br/><label>Dewey Class. No.: </label>553.27  / R52O