00934nas 2200337 c 450 991089364610332120171201181519.0(CKB)5280000000200688(DE-599)ZDB2806154-8(DE-101)1064902596(EXLCZ)99528000000020068820150113a20149999 |y |engur|||||||||||txtrdacontentcrdamediacrrdacarrierInternational journal of educational investigationsIJEI[S.l.]2014-Online-RessourceInternational Journal of Educational Investigations IJEIZeitschriftgnd-content3700355DE-1019999JOURNAL9910893646103321International journal of educational investigations4270578UNINA