Heyns, Barbara. <br/><br/>
Summer learning and the effects of schooling / 
Barbara Heyns ; with a foreword by Christopher S. Jencks. 
 - New York :  Academic Press,  c1978. 
<br/><br/> Includes indexes. 
<br/><br/>Bibliography: p. 287-314. 
<br/><br/><label>ISBN: </label>0123465508 
<br/><br/><label>LCCN: </label>78003339 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Summer schools.<br/>Educational equalization.
<br/><br/><label>LC Class. No.: </label>LC5715  / .H49 
<br/><br/><label>Dewey Class. No.: </label>370.19/34