Não informado. (1944). Public Health Economics. University of Michigan, School of Public Health.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Public Health Economics. Ann Arbor, Mich: University of Michigan, School of Public Health, 1944.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Public Health Economics. University of Michigan, School of Public Health, 1944.
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