000			00360nam a2200181Ia 4500
008			240220s9999 xx 000 0 und d
041			_aENG
082			_a621366
100			_aHeavens O. S.
245		0	_aLasers
260			_aNULL
260			_bDuckworth.
260			_c1971
300			_a159p.
365			_b0
650			_aMECHANICAL
942			_cDBK
999			_c24224 _d24224