Beard, Ruth M. <br/><br/>
An outline of Piaget's developmental Psychology for students and teachers 

 - London  Routledge  1971 
 - 128 p. 
 - The students Library of Education .
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSICOLOGIA<br/>PIAGET<br/>INTELIGENCIA<br/>SUBESTADIOS