Piaget, Jean,  1896-1980 <br/><br/>
The child's conception of movement and speed / 
Jean piaget ; translated from the french by g.e.t. holloway and m. j. mackenzie 
 - 342 páginas 
<br/><br/><label>ISBN: </label>0345023722165 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psicología infantil
<br/><br/><label>LC Class. No.: </label>BF721  / P5327 1971