Singh, Bhawani. <br/><br/>
Rock mass classification :  a practical approach in civil engineering / 
Bhawani Singh & R.K. Goel 
 - Amsterdam :  Elsevier,  1999 
 - xiii, 267 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical  references and indexes. 
<br/><br/><label>ISBN: </label>80430139  RM462.30 
<br/><br/><label>LCCN: </label>99-232835 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering geology.<br/>Rocks--Classification.