TY  - RPRT
TI  - Conditioned reinforcement and choice.
AU  - J A Nevin
AU  - C Mandell
PY  - 1978
DO  - 10.1901/jeab.1978.29-135
UR  - https://pubmed.ncbi.nlm.nih.gov/16812034/
ID  - 16812034
ER  -