TR  / RI-9240 <br/>
Alan A. Campoli <br/>
       Performance of a novel bump control pillar extracting technique during room-and pillar retreat coal mining 
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<br/><U>Author Added Entry: </u><br/>Frank E. Chase;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR6613</b>, Full Call No.: TR RI-9240,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>