TY  - RPRT
TI  - Higher-order behavior classes: contingencies, beliefs, and verbal behavior.
AU  - A C Catania
PY  - 1995
DO  - 10.1016/0005-7916(95)00033-v
UR  - https://pubmed.ncbi.nlm.nih.gov/8576398/
ID  - 8576398
ER  -