INTERNATIONAL SOCIETY FOR ROCK MECHANICS <br/><br/>
SEVENTH INTERNATIONAL CONGRESS ON ROCK MECHANICS PROCEEDINGS 

 - 3 
 - ROTTERDAM  BALKEMA  1991 
 - 30X22 
<br/><br/><label>ISBN: </label>9054-100141 
<br/><br/><label>Dewey Class. No.: </label>622.2 I61