Columbia subject headings:
Imperialism.
Severo-Kavkazskiĭ federalʹnyĭ okrug (Russia)--Ethnic relations.
Severo-Kavkazskiĭ federalʹnyĭ okrug (Russia)--History.
Harvard subject headings:
Caucasus, Northern (Russia)--History.
Imperialism
Princeton subject headings:
Caucasus, Northern (Russia)--History.