000 00317nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a660.20148 A935
100 _aAUSTIN,D.G
245 0 _aCHEMICAL ENGINEERING DRAWING SYMBOLS
260 _aLONDON
_bGEORGE GODWIN LIMITED
_c1979
300 _a30X21
942 _cBK
_2DDC
999 _c18013
_d18013