TY  - RPRT
TI  - Behavior systems and reinforcement: an integrative approach.
AU  - W Timberlake
PY  - 1993
DO  - 10.1901/jeab.1993.60-105
UR  - https://pubmed.ncbi.nlm.nih.gov/8354963/
ID  - 8354963
ER  -