Helping children learn mathematics 

 - NY. :  John Wiley&Sons,  1999 
 - 390p. 
<br/><br/><label>ISBN: </label>047136536X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Toán học--Trẻ em
<br/><br/><label>Dewey Class. No.: </label>372.7  / HEL 1999