000 00387nam a2200193Ia 4500
008 240530s9999 xx 000 0 und d
082 _a660.2
082 _bGUP
100 _aGUPTA OMPRAKASH
245 0 _aCHEMICAL ENGG
250 _n0
250 _n1993
260 _bKHANNA
300 _a496
365 _b42.5
650 _aCHEMICAL
942 _cREF
950 _CCHEMICAL
999 _c191471
_d191471