TR  / RI-9403 <br/>
Bauer E R <br/>
       Influence of subjacent gob on longwall development mining in the upper kittanning coalbed of south-central pennsylvania 
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<br/><U>Author Added Entry: </u><br/>Sames G P;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR6782</b>, Full Call No.: TR RI-9403,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>