000 00274nam a2200121Ia 4500
008 220201s1990 xx 000 0 eng d
100 _aSLEVE
245 0 _aINTRODUCTION SYSTEM ANALYSIS
260 _aDELHI
_bBPB PUB
_c1990
300 _a244
700 _aWROSE
942 _2ddc
999 _c92981
_d92981