TY  - RPRT
TI  - Two-key concurrent responding: response-reinforcement dependencies and blackouts.
AU  - E W Herbert
PY  - 1970
DO  - 10.1901/jeab.1970.14-61
UR  - https://pubmed.ncbi.nlm.nih.gov/16811458/
ID  - 16811458
ER  -