Heyns, Barbara <br/><br/>
Summer learning and the effects of schooling 
Barbara Heyns ; with a foreword by Christopher S. Jencks 
 - New York  Academic Press  1978 
 - xviii, 326 p 24 cm 
<br/><br/> Includes indexes 
<br/><br/>Bibliography: p. 287-314 
<br/><br/><label>ISBN: </label>0123465508 
<br/><br/><label>LCCN: </label>78-3339 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Summer schools<br/>Educational equalization