TY - GEN AU - Langdon,D E AU - Leeper,C K TI - Physician liberation units system SN - 0028-4793 PY - 1971///0113 KW - Financing, Government KW - United States KW - Weights and Measures N1 - Publication Type: Journal Article UR - https://doi.org/10.1056/nejm197012172832523 ER -