Columbia subject headings:
Harvard subject headings:
Dukhobors--Russia--Biography.
Khilkov, Dmitriĭ Aleksandrovich, kni︠a︡zʹ, 1857-1914.
Nobility--Russia--Biography
Socialists--Russia--Biography.
Princeton subject headings:
Dukhobors--Russia--Biography.
Khilkov, Dmitriĭ Aleksandrovich, kni︠a︡zʹ, 1857-1914.
Nobility--Russia--Biography.
Socialists--Russia--Biography.