Rock mechanics contributions and challenges :  proceedings of the 31st U. S. Symposium / 
edited by W. A. Hustrulid and G. A. Johnson. 
 - Rotterdam :  A. A. Balkema,  1990 
 - 1060 p. :  ill. ;  23 cm. 
<br/><br/> 'Colorado School of Mines/Golden/18-20 June 1990 
<br/><br/><label>ISBN: </label>9061911230  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock mechanics--Congresses.