TY  - RPRT
TI  - Secondary re4inforcement in a discrimination problem.
AU  - J G FORT
AU  - J L MYERS
AU  - MYERSNA
PY  - 1962
DO  - 10.1080/00221309.1962.9711832
UR  - https://pubmed.ncbi.nlm.nih.gov/13894162/
ID  - 13894162
ER  -