Willis, Paul M. A. <br/><br/>
Rocks and Minerals 
Paul M.A. Willis; (illustrator, Iain McKellar). 
 - Washington, D.C.:  National Geographic Society,  c1997. 
 - 80 p.:  col. ill.;  17 cm. 
 - My first pocket guide .
<br/><br/><label>ISBN: </label>0792234588 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks.<br/>Minerals.