TY  - RPRT
TI  - Interpersonal contingencies: Performance differences and cost-effectiveness.
AU  - D R Schmitt
PY  - 1987
DO  - 10.1901/jeab.1987.48-221
UR  - https://pubmed.ncbi.nlm.nih.gov/16812490/
ID  - 16812490
ER  -