Columbia subject headings:
Nechaev, Sergeĭ Gennadievich, 1847-1882.
Radicalism--Russia--History--19th century.
Tikhomirov, L. A. (Lev Aleksandrovich), 1852-1923.
Zasulich, V. I., 1849-1919.
Harvard subject headings:
Nechaev, Sergeĭ Gennadievich, 1847-1882.
Revolutionaries--Russia--Biography
Russia--History--1801-1917.
Tikhomirov, L. A. (Lev Aleksandrovich), 1852-1923.
Zasulich, V. I., 1849-1919.
Princeton subject headings: