Wragg, E.C <br/><br/>
Explaining in the Secondary School / 
E.C Wragg 
 - U.S.A :  Routledge / Falmer,  2001       
 - ix, 72 p. 
<br/><br/><label>ISBN: </label>0415249562 
<br/><br/><label>LC Class. No.: </label>LB 1607 Q5q 2001