TY  - RPRT
TI  - Secondary reinforcement as a function of the interstimulus interval: a confutation.
AU  - R L Coberly
AU  - J B Long
PY  - 1967
DO  - 10.2466/pr0.1967.21.3.929
UR  - https://pubmed.ncbi.nlm.nih.gov/6079666/
ID  - 6079666
ER  -