Gray, Eddie <br/><br/>
Success and failore in mathematics : the flexible meaning of symbols as process and concept 

 - 6-10 
 - 1993 No. 142, mar. 
 = MT :  MATHEMATICS TEACHING 
<br/><br/><label>Encabezamiento--Término de Indización: </label>ALGEBRA ARITMETICA ENSEÑANZA MATEMATICA SIMBOLOS MATEMATICOS