Spock, Leslie Erskine  1900- <br/><br/>
Guide to the study of rocks / 
L. E. Spock 
 - 2nd ed. 
 - New York :  Harper & Row,  1962 
 - xvi, 298 p. :  ill. ;  23 cm. 
 - Harper's geoscience series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology