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*24510$aIndividualized instruction :$ba descriptive analysis$cMaurice Gibbons
*260  $aNew York$bTeachers College Press$cc1971
*300  $aXI, 80 s.$bfig.
*4901 $aTheory and research in teaching
*650 0$aIndividualized instruction$_33143000
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*830 0$aTheory and research in teaching$_36272300
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