TR  / IC-9316 <br/>
Thomas M. Barczak <br/>
       The history and future of longwall mining in the united states 
 / 
 .-  ,   
<br><U>Copy Details:</u><br> Acc. No.: <b>TR6540</b>, Full Call No.: TR IC-9316,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>