Tyrrell, George Walter,    1883- <br/><br/>
The earth and its mysteries /    
George Walter Tyrrell 
 - London :   G. Bell ,   1953 
 - 278 p. :    ill. ;    19 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--------
<br/><br/><label>Dewey Class. No.: </label>551