Não informado. (1944). Public Health Economics. University of Michigan, School of Public Health.
Lua i Stíl Chicago (17ú heag.)Não informado. Public Health Economics. Ann Arbor, Mich: University of Michigan, School of Public Health, 1944.
Lua MLA (8ú heag.)Não informado. Public Health Economics. University of Michigan, School of Public Health, 1944.
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