Columbia subject headings:
Atheism--Soviet Union--History--19th century.
Kolokol.
Harvard subject headings:
Anti-clericalism--Soviet Union--History--19th century.
Atheism--Soviet Union--History--19th century.
Herzen, Aleksandr, 1812-1870--Contributions in atheism.
Kolokol.
Ogarev, N. P. (Nikolaĭ Platonovich), 1813-1877--Contributions in atheism.
Orthodox Eastern Church--Soviet Union--History--19th century.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--19th century.
Princeton subject headings:
Atheism--Soviet Union--History--19th century.
Kolokol.