000			00371nam a2200145Ia 4500
008			190529s9999 xx 000 0 und d
020			_a1851666303
082			_a622.3381 _bFRA
100			_aFraser, Ken
245		0	_aManaging drilling operations
260			_aLondon _bElsevir Applied Science _c1991
300			_a246 p.
650			_aDrilling techniques
942			_cS
999			_c117037 _d117036