TY  - RPRT
TI  - Physician liberation units system.
AU  - D E Langdon
AU  - C K Leeper
PY  - 1970
DO  - 10.1056/nejm197012172832523
UR  - https://pubmed.ncbi.nlm.nih.gov/5481769/
ID  - 5481769
ER  -