Fuson, Karen C. <br/><br/>
Children's Counting and Concepts of Number 

 - Springer- Verlag, New york  1988 
 - xiv, 446 
<br/><br/><label>ISBN: </label>3-540-96566-1 
<br/><br/><label>Dewey Class. No.: </label>372.7 Fus