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  USD 21.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Summer schools<br/>Educational equalization
<br/><br/><label>Dewey Class. No.: </label>370.193