The child's communicative competence :  language capacity in three groups of children from different social classes / 
by Ton van der Geest ... [et al.] 
 - The Hague :  Mouton,  1973 
 - 130 p. ;  22 cm. 
 - Janua linguarum.  Series minor ;  202 .
<br/><br/>Bibliography : p. 111-114 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language acquisition