Bieniawski, Z. T. <br/><br/>
Engineering rock mass classifications :  A complete manual for engineers and geologists in mining, civil and petroleum engineering / 
Z. t. bieniawski 
 - New york :  J. Wiley,  c1989 
 - 251 p 
<br/><br/> "a wiley-interscince publication" 
<br/><br/><label>ISBN: </label>0471601721 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología económica<br/>Rocas--Clasificación y nomenclatura<br/>Mecánica de rocas
<br/><br/><label>LC Class. No.: </label>TN260  / B54