000 00263nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a510
_bDAS
100 _aDass, HK
245 0 _aEngg mathematics
260 _bC.B.S Pub
_c1981
300 _a346
942 _2ddc
999 _c81811
_d81811