TY  - RPRT
TI  - Discriminated bar-press avoidance.
AU  - H S HOFFMAN
AU  - M FLESHLER
AU  - H CHORNY
PY  - 1961
DO  - 10.1901/jeab.1961.4-309
UR  - https://pubmed.ncbi.nlm.nih.gov/13908105/
ID  - 13908105
ER  -