Wu, Hung-Hsi <br/><br/>
Understanding Numbers in Elementary school Mathematics   
by Hung-Hsi Wu 
 - Rhode Island  AMS  2011 
 - xxxii, 551p 
<br/><br/><label>ISBN: </label>9780821852606 
<br/><br/><label>Dewey Class. No.: </label>372.72  / P11;1 (MA)