Columbia subject headings:
Baghdad (Iraq)--History.
Baghdad (Iraq)--Politics and government.
Iraq--History--634-1534.
Islamic Empire--Politics and government.
Power (Social sciences)--Iraq--Baghdad.
Harvard subject headings:
Baghdad (Iraq)--History--634-1534.
Baghdad (Iraq)--Politics and government.
Power (Social sciences)--Iraq--Baghdad.
Princeton subject headings:
Baghdad (Iraq)--History--634-1534.
Baghdad (Iraq)--Politics and government.
Power (Social sciences)--Iraq--Baghdad.