Columbia subject headings:
Epidemiology--Soviet Union--History.
Plague--Soviet Union--History.
Public health--Soviet Union--History.
Harvard subject headings:
Epidemiology--Soviet Union--History.
Plague--Soviet Union--Epidemiology--History.
Plague--Soviet Union--History.
Public health--Soviet Union--History.
Princeton subject headings:
Epidemiology--Russia--History.
Plague--Russia--History.
Public health--Russia--History.