Children's understanding of mathematics:11-16, 

 - England:  Antony Rowe;  1981. 
 - 231 p.:  ill.;  23 cm. 
<br/><br/> includes appendix,index and reference 
<br/><br/><label>ISBN: </label>9781905200023 
<br/><br/><label>LC Class. No.: </label>DUCE QA135.5.C478