Hill, Christopher. <br/><br/>
Harvest of the rocks. 

 - London,  Phoenix House;  1967. 
 - 63 p.  front., illus., 16 plates, diagrs.  22 1/2 cm. 
 - Progress of science series .
<br/><br/><label>Subjects--Index Terms: </label>Mines and mineral resources 
<br/><br/><label>Dewey Class. No.: </label>553  / HIL