Columbia subject headings:
Asia, Central--Annexation to Soviet Union.
Asia, Central--Relations--Soviet Union.
Caucasus--Annexation to Soviet Union.
Caucasus--Relations--Soviet Union.
Eastern question (Central Asia)
Soviet Union--Relations--Asia, Central.
Soviet Union--Relations--Caucasus.
Soviet Union--Territorial expansion.
Harvard subject headings:
Asia, Central--Annexation to Russia.
Asia, Central--Annexation to the Soviet Union.
Asia, Central--Relations--Russia.
Asia, Central--Relations--Soviet Union.
Caucasus--Annexation to Russia.
Caucasus--Annexation to the Soviet Union.
Caucasus--Relations--Russia.
Caucasus--Relations--Soviet Union.
Eastern question (Central Asia)
Russia--Relations--Asia, Central.
Russia--Relations--Caucasus.
Russia--Territorial expansion.
Soviet Union--Relations--Asia, Central.
Soviet Union--Relations--Caucasus.
Soviet Union--Territorial expansion.
Princeton subject headings:
Asia, Central--Foreign relations--Russia.
Caucasus--Foreign relations--Russia.
Great Britain--Foreign relations--Russia.
Russia--Foreign relations--Asia, Central.
Russia--Foreign relations--Caucasus.
Russia--Foreign relations--Great Britain.