TY  - RPRT
TI  - Molecular contingencies: reinforcement probability.
AU  - J M Hale
AU  - C P Shimp
PY  - 1975
DO  - 10.1901/jeab.1975.24-315
UR  - https://pubmed.ncbi.nlm.nih.gov/16811883/
ID  - 16811883
ER  -