000 00277nam a2200121Ia 4500
008 211209s1971 xx 000 0 und d
041 _aeng
082 _a658.23 N71 PET
100 _aPETERSEN D C
245 _aTECHNIQUE OF SAFETY MANAGEMENT
260 _c1971
300 _a250
999 _c14748
_d14748