TY  - RPRT
TI  - PATIENT VARIABILITY AS A FACTOR IN GROUP ACTIVITIES ON A MAXIMUM SECURITY WARD.
AU  - R S PARKER
PY  - 1965
DO  - 10.1007/bf01569465
UR  - https://pubmed.ncbi.nlm.nih.gov/14276909/
ID  - 14276909
ER  -