TY  - RPRT
TI  - Avoidance responding as a function of stimulus duration and relation to free shock.
AU  - E Shimoff
PY  - 1972
DO  - 10.1901/jeab.1972.17-451
UR  - https://pubmed.ncbi.nlm.nih.gov/4624512/
ID  - 4624512
ER  -