000 00272nam a2200109Ia 4500
008 211214s9999 xx 000 0 und d
100 _aKulshreshtha, S. R. and Pasrichar, Harpal
245 _aTeaching of Science
260 _bR.Lall
_c2013
300 _a510
942 _cBK
999 _c101954
_d101954