TY  - GEN
AU  - HEIDBREDER,E
TI  - The attainment of concepts; exploratory experiments on conceptualization at perceptual levels
SN  - 0022-3980
PY  - 2008///1016
KW  - Concept Formation
KW  - Humans
KW  - Psychology
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1080/00223980.1948.9917401
ER  -