Tyrrell G W <br/><br/>
Principles of pertrology    An introduction to the    

 - London  Methuen U K          1926 
 - xii,349p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H2, F6