000 00237nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aNCERT
245 0 _aSamajik Vigyan
260 _aNCERT
_bNCERT
_c1972
300 _a265p.
942 _cBK
999 _c13982
_d13982