Proceedings of the Workshop on Coal Pillar Mechanics and Design / 
compiled by Anthony T. Iannacchione ... [et al.]. 
 - [Pittsburgh, PA] :  U.S. Dept. of the Interior, Bureau of Mines,  1992. 
 - 302 p. :  ill. ;  28 cm. 
 - Information circular ;  9315 .
 - Information circular (United States. Bureau of Mines) ;  9315. .
<br/><br/> Held in Santa Fe, NM, June 7, 1992.  Correction sheet for p. 123, 253, and 295 inserted. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>92189768  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Columns--Congresses.<br/>Ground control (Mining)--Congresses.<br/>Coal mines and mining--Congresses.
<br/><br/><label>LC Class. No.: </label>TN295  TN288  / .U4 no. 9315 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.334