Columbia subject headings:
Caspian Sea Region--Politics and government.
Caspian Sea Region--Strategic aspects.
Geopolitics--Caspian Sea Region.
Petroleum industry and trade--Political aspects--Caspian Sea Region.
Petroleum pipelines--Location--Caspian Sea Region.
Russia, Southern--Ethnic relations.
Harvard subject headings:
Caspian Sea Region--Politics and government.
Caspian Sea Region--Strategic aspects.
Geopolitics--Caspian Sea Region.
Petroleum industry and trade--Political aspects--Caspian Sea Region.
Petroleum pipelines--Caspian Sea Region--Location.
Russia, Southern--Ethnic relations.
Princeton subject headings: