Proceedings Seventh International Congress on Rock Mechanics, Zacatecas, Mexico, 16 - 20 1991 : Volume 1 / 
Organisation of the Seventh ISRM Congress 
 - Rotterdam :  A. A. Balkema,  1991 
 - xxx, 840 pages .:  graph, illustrations .;  30 cm 
<br/><br/> Proceedings 7th Congress on Rock Mechanics, September 16 - 20, 1991   
<br/><br/>Volume 1 : Rock Mechanics and environmental protection<br/>                : Rock mechanics based on a reliable description of geological conditions 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9054100133 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock mechanics--Congresses
<br/><br/><label>Dewey Class. No.: </label>624.131  / PRO 1991