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| 020 | _a0727725882 | ||
| 082 | _a622.26 B862 | ||
| 100 | _aBRITISH TUNNELLING SOCIETY | ||
| 245 | 0 | _aMODEL SPECIFICATION FOR TUNNELLING | |
| 260 |
_aLONDON _bTHOMS TELFORD _c1997 |
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| 300 | _a29X21 | ||
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| 999 |
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