Columbia subject headings:
Revolutionaries--Russia.
Harvard subject headings:
Alekseev, Petr Alekseevich, 1849-91.
I︠U︡zhnorossiĭskiĭ soi︠u︡z rabochikh.
Khalturin, Stepan Nikolaevich, 1857-1882.
Obnorskiĭ, Viktor Pavlovich, 1852-1920.
Princeton subject headings: