TR  / IC-7813 <br/>
J. J. Shields <br/>
       Mechnical mining in some bituminous-coal mines 
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<br/><U>Author Added Entry: </u><br/>W. A. Haley;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR5403</b>, Full Call No.: TR IC-7813,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>