Ernst W G <br/><br/>
Earth materials 
Ernst W G 
 -  1969 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>49649 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Petrology<br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H2, K9