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020 | _a0873350677 | ||
082 | _a622.2606 J17 | ||
100 | _aJACOBS,J.M | ||
245 | 0 | _aRAPID EXCAVATION AND TUNNELING CONFERENCE: PROCEEDINGS VOL.II | |
260 |
_aLITTLETON _bSMME _c1987 |
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300 | _a24X16 | ||
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