Harker, Alfred, 1859-1939. <br/><br/>
Petrology for students n introduction to the study of rocks under the microscope 
by Alfred Harker. 
 - 8th ed. rev. 
 - Cambridge  Cambridge University Press  1954. 
 - 283 pages. : illustrations. ; 19 cm. 
<br/><br/><label>ISBN: </label>0521052114 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology