TY  - RPRT
TI  - Role expansion or role extension: some conceptual differences.
AU  - J F Murphy
PY  - 1970
DO  - 10.1111/j.1744-6198.1970.tb01049.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5205119/
ID  - 5205119
ER  -