000			00304nam a2200133Ia 4500
008			220613s9999||||xx |||||||||||||| ||und||
100			_aJames H Block
245		0	_aMastery Learning Theory And Practice
250			_a1971
260			_bHOLT
300			_a152
650			_aMedical Education
942			_cGB
999			_c2603 _d2603