Barnes, John W. <br/><br/>
Basic geological mapping 

 - New York  Open University Press  1981 
 - 112p. 
<br/><br/><label>ISBN: </label> UKP 5.50 
<br/><br/><label>Source: </label> UKP 5.50 
<br/><br/><label>Dewey Class. No.: </label>551 BAR