Columbia subject headings:
Caucasus--Foreign relations--19th century.
Caucasus--Foreign relations--Russia--19th century.
Caucasus--History, Military--19th century.
Caucasus--History--19th century.
Russia--Foreign relations--Caucasus--1801-1917.
Harvard subject headings:
Caucasus--History--19th century.
Princeton subject headings:
Caucasus--Foreign relations--19th century.
Caucasus--Foreign relations--Russia--19th century.
Caucasus--History, Military--19th century.
Caucasus--History--19th century.
Russia--Foreign relations--Caucasus--1801-1917.