Columbia subject headings:
Anarchists--Bibliography.
Kropotkin, Petr Alekseevich, kni︠a︡zʹ, 1842-1921--Bibliography.
Harvard subject headings:
Kropotkin, Petr Alekseevich, kni︠a︡zʹ, 1842-1921--Bibliography.
Princeton subject headings:
Kropotkin, Petr Alekseevish, kni︠a︡zʹ, 1842-1921--Bibliography.