Thomas, John Albert Gay <br/><br/>
An introduction to geological maps / 
J. A. G Thomas. 
 - London :  Murby,  1966. 
 - 64 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Maps.
<br/><br/><label>Dewey Class. No.: </label>550.22