FOSNOT, Catherine Twomey. <br/><br/>
Young Mathematicians at Work/ 

 - Hanover Street;  Heinemann,  2001. 
 - xx,  193  p.  ill. 
<br/><br/> Includes  References and Index. 
<br/><br/><label>ISBN: </label>9780325003535 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Constructing Number Sense, Addition and Subtraction.
<br/><br/><label>Dewey Class. No.: </label>372.7 FOS.