Columbia subject headings:
Imperialism.
Middle East--Foreign relations--20th century.
Middle East--Politics and government--20th century.
World politics--20th century.
Harvard subject headings:
Germany--Foreign relations--Middle East
International relations--20th century.
Middle East--Foreign relations--20th century.
Middle East--Foreign relations--Germany.
Middle East--Politics and government--20th century.
Petroleum industry and trade--Political aspects--Middle East--History--20th century.
World politics--20th century
Princeton subject headings:
Imperialism.
Middle East--Foreign relations--20th century.
Middle East--Politics and government--20th century.
World politics--20th century.