Não informado. (1968). Abstracts on hygiene. Bureau of Hygiene and Tropical Diseases.
Chicago-viite (17. p.)Não informado. Abstracts on Hygiene. London: Bureau of Hygiene and Tropical Diseases, 1968.
MLA-viite (8. p.)Não informado. Abstracts on Hygiene. Bureau of Hygiene and Tropical Diseases, 1968.
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