TY  - RPRT
TI  - Approach versus avoidance in an ambiguous-cue discrimination problem in chimpanzees.
AU  - R THOMPSON
PY  - 1954
DO  - 10.1037/h0060851
UR  - https://pubmed.ncbi.nlm.nih.gov/13152227/
ID  - 13152227
ER  -