Columbia subject headings:
Anarchism--Soviet Union--History.
Kropotkin, Petr Alekseevich, kni︠a︡zʹ, 1842-1921.
Harvard subject headings:
Princeton subject headings:
Anarchism--Russia--History--Congresses.
Anarchists--Russia--Biography--Congresses.
Kropotkin, Petr Alekseevich, kni︠a︡zʹ, 1842-1921--Congresses.