TY  - RPRT
TI  - General activity as instrumental: application to avoidance training.
AU  - V GRAF
AU  - M E BITTERMAN
PY  - 1963
DO  - 10.1901/jeab.1963.6-301
UR  - https://pubmed.ncbi.nlm.nih.gov/13949747/
ID  - 13949747
ER  -