Bieniawski, Z.T. <br/><br/>
Engineering rock mass classifications : a complete manual for engineers and geologists in mining, civil, and petroleum engineering 

 - New York, N.Y. :  Wiley,  1989 
 - 251 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOLOGY, ECONOMIC<br/>ROCKS--CLASSIFICATION<br/>ROCK MECHANICS
<br/><br/><label>LC Class. No.: </label>TN260  / B54