Werdelin, Ingvar. <br/><br/>
A study of age differences in factorial structure 
[by] I. Werdelin. 
 - Malmo,  Lararhogskolen,  1966. 
 - Diadakometry ;  6 .
 - Special-topic bulletin from Department of Educational and Psychological Research, School of Education, Marmo, Sweden .
 - Special-topic bulletin from Department of Educational and Psychological Research, School of Education, Malmo, Sweden. .
<br/><br/> Cover title. 
<br/><br/>Bibliography: p. 16. 
<br/><br/><label>LCCN: </label>73565968 //r85 
<br/><br/><label>Nat. Bib. No.: </label>S66-70 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability, Influence of age on.<br/>Ability -- Testing.--Ability -- Testing.
<br/><br/><label>LC Class. No.: </label>LB5  / .D5 no. 6 
<br/><br/><label>Dewey Class. No.: </label>370.1 s