TY  - RPRT
TI  - VERBAL DISCRIMINATION PERFORMANCE UNDER DIFFERENT VERBAL REINFORCEMENT COMBINATIONS.
AU  - J T SPENCE
PY  - 1964
DO  - 10.1037/h0045522
UR  - https://pubmed.ncbi.nlm.nih.gov/14114920/
ID  - 14114920
ER  -