Fifteen thousand hours :  secondary schools and their effect on children : a discussion / 
[by] Barbara Tizard [and others]. 
 - London :  University of London Institute of Education,  [1983] 
 - Bedford Way papers ;  1 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0854730907 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Secondary.