Columbia subject headings:
Levtonov, Vladimir, 1889-1938.
Revolutionaries--Russia--Biography.
Shlisselʹburgskai︠a︡ ti︠u︡rʹma--History.
Harvard subject headings:
Levtonov, Vladimir, 1889-1938.
Revolutionaries--Russia--Biography
Shlisselʹburgskai︠a︡ ti︠u︡rʹma--History.
Princeton subject headings:
Levtonov, Vladimir, 1889-1938.
Revolutionaries--Russia--Biography.
Shlisselʹburgskai︠a︡ ti︠u︡rʹma--History.