Trastornos del aprendizaje del cálculo 
Dugas ... [et al.]. 
 - Barcelona  Editorial Fontanella  1972. 
 - 206 p.  ill.  24 cm. 
 - Conducta humana .
<br/><br/> Translation of Troubles de l'apprentissage du calcul. 
<br/><br/>Includes bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)<br/>Handicapped children--Education--Mathematics.