TY  - RPRT
TI  - Discrimination learning and learning sets to visual exploration incentives.
AU  - R A BUTLER
AU  - H F HARLOW
PY  - 1957
DO  - 10.1080/00221309.1957.9920369
UR  - https://pubmed.ncbi.nlm.nih.gov/13475710/
ID  - 13475710
ER  -