Watson, Janet, 1923- <br/><br/>
Rocks and minerals 
Janet Watson 
 - London  George Allen and Unwin  1979 
 - 72p. ill. 25cm 
<br/><br/><label>ISBN: </label>044-5510318 
<br/><br/><label>LCCN: </label>78-41295 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy<br/>Rocks<br/>Petrology