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 :   John Wiley and Sons,  c1989 
 - xii, 251p. : ill., 23cm. 
 - A Wiley- Interscience publication. .
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0471601721[hc.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Economic.<br/>Rocks--Claasification.<br/>Rock mechanics.
<br/><br/><label>Dewey Class. No.: </label>624.15132  / B588