TY  - RPRT
TI  - Work: a weak reinforcer.
AU  - G H Collier
PY  - 1970
DO  - 10.1111/j.2164-0947.1970.tb02731.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5291225/
ID  - 5291225
ER  -