John I . PIatt, John Challinor. <br/><br/>
Simple Geological Structure 
John Challinor, John I. PIatt. 
 - Metric edition. 
 - University College of Wales.  Tomas Murby & Co.  1974. 
 - 56p.  pbk. 
<br/><br/><label>LC Class. No.: </label>QE28.2P4 1974.