000 00289nam a2200121Ia 4500
008 211209s1979 xx 000 0 und d
041 _aeng
082 _a604.2 660 201 48 N79 AUS
100 _aAUSTIN D G
245 _aCHEMICAL ENGINEERING DRAWING SYMBOL
260 _c1979
300 _a96
999 _c14648
_d14648