Mining systems adjusted to high rock pressure conditions :  proceedings of the 9th Plenary Scientific Session of the International Bureau of Strata Mechanics, World Mining Congress, Varna, 18-21 June, 1985 / 
edited by A. Kidybi nski, M. Kwa sniewski. 
 - Rotterdam ;  Boston :  A.A. Balkema,  1986. 
 - x, 348 p. :  ill. 
<br/><br/> English and German. 
<br/><br/><label>ISBN: </label>9061916585 
<br/><br/><label>LCCN: </label>90042166 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining engineering.<br/>Rock mechanics.