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040			_aMAIN
041			_aEnglish
082			_a371.3 _bMER
100			_aMerrill, David M.
245			_aInstructional design : readings
260			_aNew jersey _bPrentice Hall _c1971
300			_axv,393p.
650			_aEducation
650			_aMethods of instruction
942			_cBK
999			_c31531 _d31531