000 00267nam a2200121Ia 4500
100 _aRyburn, W. M.
942 _cBK
654 _a
245 _aPrinciples of Teaching
260 _aLondon
_bOxford University Press
_c1949
082 _a371. 3
300 _c24.8cm
_a237
999 _c420033
_d420033
041 _aeng