Duff, R. S. (1964). Changes in Family Medical-Care Expenditures and Voluntary Health Insurance: A Five-Year Resurvey.
Citação norma ChicagoDuff, Raymond S. Changes in Family Medical-Care Expenditures and Voluntary Health Insurance: A Five-Year Resurvey. 1964.
MLA CitationDuff, Raymond S. Changes in Family Medical-Care Expenditures and Voluntary Health Insurance: A Five-Year Resurvey. 1964.
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