000			00334nam a2200133 4500
082			_a370 _bRYB.P
084			_2Colon Classification
100			_aRyburn, W M
245			_aPrinciples of teaching / _cby W M Ryburn
260			_aNew York : _bOxford University Press, _c1957.
300			_a244p. :
650			_aEducation
942			_cBK
999			_c680589 _d680589