TY  - RPRT
TI  - Physiological changes associated with changing fixed ratio schedules in rats.
AU  - M A Persinger
AU  - K P Ossenkopp
AU  - V Kamaya
AU  - J J Pear
PY  - 1974
DO  - 10.2466/pr0.1974.35.2.847
UR  - https://pubmed.ncbi.nlm.nih.gov/4438531/
ID  - 4438531
ER  -