TY  - RPRT
TI  - Within-session changes in responding during several simple schedules.
AU  - F K McSweeney
AU  - J M Roll
AU  - J N Weatherly
PY  - 1994
DO  - 10.1901/jeab.1994.62-109
UR  - https://pubmed.ncbi.nlm.nih.gov/16812736/
ID  - 16812736
ER  -