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040 _beng
040 _cIN-NITTTR
041 _aeng
082 _a371.33 H363I
100 _aHeidt, Erhard U.
245 0 _aInstructional media and the individual learner :
_b a classification systems appraisal /
_cHeidt, Erhard U.
942 _2ddc
_cBK
999 _c16566
_d16566