Educational achievements of thirteen-year olds in twelve countries  results of an international research project, 1959-61, 
Arthur W. Foshay [and others] 
 - Hamburg  1962. 
 - 68 p.  diagrs., tables.  24cm. 
 - International studies in education, 28 .
<br/><br/> Label mounted on title page: Distributed by Unesco Publications Center, New York. 
<br/><br/><label>LCCN: </label>65039960  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education , Elementary<br/>Child development
<br/><br/><label>LC Class. No.: </label>LB1135  / .H25