000 00266nam a2200121Ia 4500
008 230321s9999 xx 000 0 und d
082 _a372.83
_bBHA
100 _aBhatnagar, A.B
245 0 _aTeaching of Science
260 _bAhim Pub.
300 _a491
942 _cBK
999 _c2803
_d2803