000			00345nam a2200133Ia 4500
082			_a370.152 _bBLM
245			_aMastery learning _b: theory and practie _cJames H. Block
260			_aNew York _bHolt Rinehart _c1971
300			_av, 152p.
546			_aeng
650			_aLearning, psychology of _918991
650			_aEducation _919725
942			_cBK
999			_c24360 _d24360