Não informado. (1926). Bulletin of hygiene. Bureau of Hygiene and Tropical Diseases.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of Hygiene. London: Bureau of Hygiene and Tropical Diseases, 1926.
Lua MLA (8ú heag.)Não informado. Bulletin of Hygiene. Bureau of Hygiene and Tropical Diseases, 1926.
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