000 00299nam a2200121Ia 4500
008 220201s1985 xx 000 0 eng d
082 _a621.9
_bGUP
100 _aGupta,ML&Ravinder kumar
245 0 _aWorkshop calculation&science
260 _bDhanpat rai&sons
_c1985
300 _a296
942 _2ddc
999 _c83237
_d83237