Precautions taken to prevent the spread of smallpox through the mail

Autor:	Tubbs, W. C., Allen, J. I., Hess, J. F., Shauman, J. I., Holliday, John
Zdroj:	Public Health Reports (1896-1970), 1899 Jan . 14(3), 94-94.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41450414 Zobrazit plný text záznamu