Lawson, R. I. <br/><br/>
A system for the computer storage and retrieval of petrographical and related data / 
R. I. Lawson, J. R. Hawkes and J. Dangerfield. 
 - London:   Her Majesty's Stationery Office,   1976.  
 - iii, 42 p. :  tables ;  30 cm. 
 - Institute of Geological Sciences : Natural Environment Research Council. 75/5 .
<br/><br/>Includes bibliographical references (p. 6-7). 
<br/><br/><label>ISBN: </label>0118807250 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrography
<br/><br/><label>Dewey Class. No.: </label>621.39021