TY  - RPRT
TI  - Programmed instruction for institutionalized offenders: contingency management and performance contracts.
AU  - C B Clements
AU  - J M McKee
PY  - 1968
DO  - 10.2466/pr0.1968.22.3.957
UR  - https://pubmed.ncbi.nlm.nih.gov/5653404/
ID  - 5653404
ER  -