TY  - RPRT
TI  - Secondary reinforcement and avoidance conditioning.
AU  - J V MURPHY
AU  - R E MILLER
AU  - E BROWN
PY  - 1958
DO  - 10.1080/00221309.1958.9710188
UR  - https://pubmed.ncbi.nlm.nih.gov/13587930/
ID  - 13587930
ER  -