Barnes, John Wykeham <br/><br/>
Basic geological mapping / 
John W. Barnes 
 - England :  Open University Press,  1981 
 - 111 p. ;  21 cm. 
<br/><br/><label>ISBN: </label>0470272503 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geological mapping