Hart, K. M. <br/><br/>
Children's understanding of Mathematics:  11-16 
K. M. Hart; M. L. Brown; D. E. Kuchemann 
 - London:  The CSMS Mathematical team,  1981. 
 - 231 p.:  ill.;  22 cm. 
<br/><br/> Includes Appendix, Bibliographical index and references 
<br/><br/><label>ISBN: </label>071953772X 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>DUCE QA14.39H