HEIDBREDER, E <br/><br/>
The attainment of concepts; exploratory experiments on conceptualization at perceptual levels.  [electronic resource] 

 -  The Journal of psychology  Jul 1948 
 - 193-216 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-3980 
<br/><br/><label>Standard No.: </label>10.1080/00223980.1948.9917401  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concept Formation<br/>Humans<br/>Psychology