Sarama, Julie: Clements Douglas H <br/><br/>
Early childhood mathematics education research : learning trajectories for young children 

 - Newyork  Routledge  2009 
 - xiv,410 
<br/><br/>
<br/><br/><br/>E 
<br/><br/><label>Dewey Class. No.: </label>372.7/Sar/Cle