TY  - RPRT
TI  - Learning motivated by a manipulation drive.
AU  - H F HARLOW
AU  - M K HARLOW
AU  - D R MEYER
PY  - 1950
DO  - 10.1037/h0056906
UR  - https://pubmed.ncbi.nlm.nih.gov/15415520/
ID  - 15415520
ER  -