TY  - RPRT
TI  - Within-session changes in key and lever pressing for water during several multiple variable-interval schedules.
AU  - F K McSweeney
AU  - J N Weatherly
AU  - S Swindell
PY  - 1995
DO  - 10.1901/jeab.1995.64-75
UR  - https://pubmed.ncbi.nlm.nih.gov/16812763/
ID  - 16812763
ER  -