000 00262nam a2200097Ia 4500
008 160930s9999 xx 000 0 und d
100 _aSharma, Ashok and Agrawal, Meenu
245 _aSamajik Vigyan Shikshan
260 _aAgra
_bH. P. Bhargava Book House
942 _cBK
999 _c4648
_d4648