doctor of philosophy. <br/><br/>
Psychological studies in twin differences :  with reference to afterimage and eidetic phenomena as well as more general personality characteristics. 

 - Lund :  C.W.K. Gleerup,  [1949] 
 - Studia psychologica et paedagogica. Series altera. Investigationes ;  3 .
 - Studia psychologica et paedagogica. Series altera, Investigationes. Investigationes ;  Studia psychologica et paedagogica. Series altera, Investigationes. Investigationes ;  Studia psychologica et paedagogica. Series altera, Investigationes. Investigationes ;  Studia psychologica et paedagogica. Series altera, Investigationes. Investigationes ;  3 .
<br/><br/> Extra t.p. with thesis statement inserted. 
<br/><br/>Thesis - Lund. 
<br/><br/>Bibliography: p. 234-243. 
<br/><br/><label>LCCN: </label>51018126 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Difference (Psychology)<br/>Twins.