TY  - RPRT
TI  - Intercurrent and reinforced behavior under multiple spaced-responding schedules.
AU  - J B Smith
AU  - F C Clark
PY  - 1974
DO  - 10.1901/jeab.1974.21-445
UR  - https://pubmed.ncbi.nlm.nih.gov/16811756/
ID  - 16811756
ER  -