00769nam a22002657i 450000500170000000800410001702200140005804100080007210000190008024500920009965000250019165000170021665000290023365000240026265000130028665000160029965000170031565000150033265000230034765300170037065300120038765500150039970000110041477300780042520141212093338.0930309s1993    sp     gr     000 0 spa c  a1944-7558  aeng1 aSTEFFENS, M.L.10aVOCAL DEVELOPMENT IN INFANTS WITH SOWN SYNDROME AND INFANTS WHO ARE DEVELOPING NORMALLY14aDesarrollo cognitivo14aDiscapacidad14aDiscapacidad intelectual14aEstudio comparativo14aInfancia14aPrelenguaje14aPsicología14aResultados14aSíndrome de Down10aDiscapacidad10aMenores 4aDocumental1 aET AL.0 tAMERICAN JOURNAL ON MENTAL RETARDATIONgVol. 97, no. 2 (1992), p. 235-246