00477nam a22001697i 450000500170000000800410001704100080005810000190006624500480008565000170013365000250015065000130017565000200018865300170020865500150022577300670024020141212092942.0881224s1988 sp gr 000 0 spa c aeng1 aKAUFFMAN, J.M.10aRESEARCH IN SPECIAL EDUCATION: A COMMENTARY14aDiscapacidad14aEducación especial14aHistoria14aInvestigación10aDiscapacidad 4aDocumental0 tREMEDIAL AND SPECIAL EDUCATIONgVol. 8, no. 6 (1987), p. 57-62