TY  - RPRT
TI  - LEVER DISPLACEMENT UNDER A VARIABLE RATIO SCHEDULE AND SUBSEQUENT EXTINCTION.
AU  - R M HERRICK
AU  - R A BROMBERGER
PY  - 1965
DO  - 10.1037/h0022063
UR  - https://pubmed.ncbi.nlm.nih.gov/14313779/
ID  - 14313779
ER  -