Rock classification systems for engineering purposes / 
Louis Kirkaldie, editor. 
 - Philadelphia, PA :  ASTM,  c1988. 
 - vii, 167 p. :  ill. 
 - STP ;  984 .
 - ASTM special technical publication  984. .
<br/><br/> Papers from the Symposium on Rock Classification Systems for Engineering Purposes, held in Cincinnati, Ohio, June 25, 1987, and sponsored by ASTM Committee D-18 on Soil and Rock.  "ASTM publication code number (PCN) 04-984000-38." 
<br/><br/><label>ISBN: </label>0803109881 
<br/><br/><label>LCCN: </label>90034190     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks--Classification.<br/>Engineering geology