Piaget, Jean,  1896-1980 <br/><br/>
The child's conception of movement and speed / 
translated by G. E. T. Holloway and M. J. Mackensie 
 - 306 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Niños--Crecimiento
<br/><br/><label>LC Class. No.: </label>BF721  / P5327