Columbia subject headings:
Oman--Economic conditions--Periodicals.
Oman--Politics and government--Periodicals.
Yemen (Republic)--Economic conditions--Periodicals.
Yemen (Republic)--Politics and government--Periodicals.
Yemen, South--Economic conditions--Periodicals.
Yemen, South--Politics and government--Periodicals.
Harvard subject headings:
Oman--Economic conditions--Periodicals.
Oman--Politics and government--Periodicals.
Yemen (People's Democratic Republic)--Politics and government--Periodicals.
Yemen (Republic)--Economic conditions--Periodicals.
Yemen (Republic)--Politics and government--Periodicals.
Yemen, South--Economic conditions--Periodicals.
Princeton subject headings:
Oman--Economic conditions--Periodicals.
Yemen (People's Democratic Republic)--Economic conditions--Periodicals.
Yemen--Economic conditions--Periodicals.