School hygiene. A report of the fourth International congress of school hygiene, held at Buffalo, N.Y., August 25-30, 1913 - Ryan, Will Carson, 1885- [from old catalog],International congress on school hygiene. 4th, Buffalo, 1913. [from old catalog]

School hygiene. A report of the fourth International congress of school hygiene, held at Buffalo, N.Y., August 25-30, 1913

Воспроизведено в оригинальной авторской орфографии издания 1913 года (издательство "Washington, Govt. print. off.").

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4 из 5, 5 голос(-ов).

28 руб.	85 руб.
29 руб.	149 руб.