TY  - RPRT
TI  - BEHAVIORAL CONTRAST DURING MULTIPLE AVOIDANCE SCHEDULES.
AU  - G A WERTHEIM
PY  - 1965
DO  - 10.1901/jeab.1965.8-269
UR  - https://pubmed.ncbi.nlm.nih.gov/14342362/
ID  - 14342362
ER  -