Howells, M. F. <br/><br/>
The Capel Curig Volcanic Formation / 
M. F. Howells and B. E. Leveridge. 
 - London:   Her Majesty's Stationery Office,   1980.  
 - 23 p. :  ill., maps ;  30 cm. 
 - Institute of Geological Sciences : Natural Environment Research Council. 80/6 .
<br/><br/>Includes bibliographical references (p. 15-16). 
<br/><br/><label>ISBN: </label>011884184X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Volcanic ash, tuff, etc
<br/><br/><label>Dewey Class. No.: </label>552.2