TY  - RPRT
TI  - Choice between concurrent schedules.
AU  - R L Menlove
AU  - M Moffitt
AU  - C P Shimp
PY  - 1973
DO  - 10.1901/jeab.1973.19-331
UR  - https://pubmed.ncbi.nlm.nih.gov/16811668/
ID  - 16811668
ER  -