TR  / RI-9242 <br/>
David K. Ingram <br/>
       Surface fracture development over longwall panels in south-central virginia 
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<br><U>Copy Details:</u><br> Acc. No.: <b>TR6615</b>, Full Call No.: TR RI-9242,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>