Comfort, Iris Tracy <br/><br/>
Earth treasures :  rocks and minerals / 
by Iris Tracy Comfort ; illustrated by Jan Fairservis 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1964 
 - 72 p. :  ill. ;  22 cm. 
<br/><br/> Discusses the formation, properties, and uses of different kinds of rocks and minerals 
<br/><br/><label>LCCN: </label>64-011056 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks--Juvenile literature<br/>Mineralogy--Juvenile literature