TR  / RI-9238 <br/>
Tobias W. Goodman <br/>
       Rotary drilling techniques used in the beckley coalbed 
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<br><U>Copy Details:</u><br> Acc. No.: <b>TR6611</b>, Full Call No.: TR RI-9238,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>