Medicine and healthcare

Petrov, Alexander Vasilyevich (1837-1885). Notes on zemstvo medicine in the Kazan province. Kazan: Univ. type., 1872.

РГБ

Vysotsky, Nikolai Fedorovich (1843-1922). Typhoid epidemic in Kazan and ways to combat it. Kazan: type. ON. Ilyashenko, 1892.

НБ Чувашской Республики