Ehlers, Ernest G. <br/><br/>
Petrology  igneous, sedimentary, and metamorphic 
Ernest G. Ehlers, Harvey Blatt. 
 - San Francisco  Freeman  1982. 
 - 732pages. illustrations. 24cm 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology