Columbia subject headings:
Harvard subject headings:
Rural health--Russia--History--19th century.
Rural health--Russia--History--20th century.
Russia--Rural conditions
Russia--Social conditions--1801-1917.
Princeton subject headings:
Medicine, Rural--Russia--History.
Public health--Russia--History.
Russia--Rural conditions--19th century.
Russia--Rural conditions--20th century.
Sanitation--Russia.