TR  / IC-7568 <br/>
S. P. Polack <br/>
       Methods of excavation and roof support used in some recently constructed tunnels 
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<br><U>Copy Details:</u><br> Acc. No.: <b>TR5226</b>, Full Call No.: TR IC-7568,   Item type:  Technical Report , Location: General Stacks, <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>