000 00270nam a2200121Ia 4500
008 211209s1978 xx 000 0 und d
041 _aeng
082 _a620.73 N78 CHE
100 _aCHESTNAT H
245 _aSYSTEMS ENGINEERING TOOLS
260 _c1978
300 _a646
999 _c12387
_d12387