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024 _a67279
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aD313, K8
100 _aMaurer William C.
245 0 _aNovel drilling techniques
260 _c1968
300 _ap.
_ccm.
650 _aBuilding engineering
942 _hD313, K8
_cTEXL
_2CC
999 _c32325
_d32325