TY  - RPRT
TI  - Choice and reinforcement delay.
AU  - G D Gentry
AU  - M J Marr
PY  - 1980
DO  - 10.1901/jeab.1980.33-27
UR  - https://pubmed.ncbi.nlm.nih.gov/16812159/
ID  - 16812159
ER  -