Columbia subject headings:
Obnorskiĭ, Viktor Pavlovich, 1851-1919.
Working class--Russia.
Harvard subject headings:
Biographies
Obnorskiĭ, Viktor Pavlovich, 1852-1919.
Revolutionaries--Russia--Biography
Princeton subject headings:
Obnorskiĭ, Viktor Pavlovich, 1852-1920.