HELM, J <br/><br/>
[Methodological remarks on the subject of developmental psychology].  [electronic resource] 

 -  Zeitschrift fur Psychologie mit Zeitschrift fur angewandte Psychologie  Jun 1961 
 - 66-76 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0044-3409 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child<br/>Humans<br/>Psychology, Child<br/>Psychology, Developmental