000 00258nam a2200109Ia 4500
942 _cBK
654 _a
245 _aTeaching of science in secondary schools
260 _aLondon
_bJohn Murray Publishers
_c1947
082 _a375.5
300 _bHb
_c21.2
_axi,272
999 _c413209
_d413209
041 _aeng