Columbia subject headings:
Islam--Morocco--History--20th century.
Morocco (Spanish zone)--History.
Morocco--Foreign relations--Spain.
Spain--Foreign relations--Morocco.
Harvard subject headings:
Islam--Morocco--History--20th century.
Morocco (Spanish zone)--History.
Morocco (Spanish zone)--Relations--Spain.
Morocco--Foreign relations--Spain.
Morocco--History--1912-1956.
Spain--Foreign relations--Morocco.
Spain--Relations--Morocco (Spanish zone)
Princeton subject headings:
Morocco (Spanish zone)--Relations--Spain.
Morocco--History--1912-1956.
Spain--Relations--Morocco (Spanish zone).