000			00500nab a2200157 4500
005			20260520002711.0
008			260224s xxu
245	0	0	_aCutting edge
270			_a12/09/06 ; 3/2/05
300			_a3 p.
520			_aPDC bits increasingly displace roller cone bits as technology rapidly evolves.
773	0		_tNew technology magazine _gVol. 11, no. 1 (ene./feb. 2005) ; p. 34-36
942			_cARTICULO
100	1		_aSmith, Maurice _934791
999			_c163559 _d163559