000			00307nam a2200145Ia 4500
008			190201s9999 xx 000 0 und d
082			_a621
082			_b9023 M
100			_a"Martin, S J"
245		0	_aNumerical Control Of Mac
260			_aLondon
260			_bELBS
260			_c1970
300			_a302
999			_c20753 _d20753