000 00235nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aS.C.Aggrawal
245 0 _aViphan Ke Sidhaanth
260 _aN.Delhi
_bDhanpat Rai
_c2004
942 _cBK
999 _c11931
_d11931