000 00342nam a2200145Ia 4500
020 _a0000000000
082 _b2612
_a510
100 _a"S.N.Sharma"
245 0 _aMental Mathematics
260 _bGoyal Brothers Prakashan
_aNew Dehli
_c1996
300 _a52
944 _cTR
999 _c584078
_d584078