Allen, John R. L. <br/><br/>
Physical geology/ 
John R. L. Allen. 
 - London:  George Allen & Unwin,  1975. 
 - 141 p. :   ill. ;   24 cm. 
<br/><br/> includes index. 
<br/><br/><label>ISBN: </label>0045500223 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geology.