TY  - RPRT
TI  - Negative behavioral contrast on multiple treadle-press schedules.
AU  - F K McSweeney
PY  - 1978
DO  - 10.1901/jeab.1978.29-463
UR  - https://pubmed.ncbi.nlm.nih.gov/16812070/
ID  - 16812070
ER  -