000 00342nam a2200157Ia 4500
020 _a81-7450-639-X
082 _a574
100 _aNational Council Of Educational Research And Training
245 0 _aBiology XII
250 _a-
260 _aNew Delhi
_bN C E R T
300 _a290
500 _a1277
650 _aBiology
942 _cBK
999 _c21867
_d21867