TY  - RPRT
TI  - Age differences in card--sorting performance in relation to task difficulty, task set, and practice.
AU  - J BOTWINICK
AU  - J S ROBBIN
AU  - J F BRINLEY
PY  - 1960
DO  - 10.1037/h0046590
UR  - https://pubmed.ncbi.nlm.nih.gov/13803171/
ID  - 13803171
ER  -