Columbia subject headings:
Morocco--Foreign relations--Spain.
Morocco--History.
Spain--Foreign relations--Morocco.
Harvard subject headings:
Morocco--Foreign relations--Spain.
Morocco--History--19th century.
Morocco--History--20th century.
Spain--Foreign relations--Morocco.
Spaniards--Morocco--History--19th century.
Spaniards--Morocco--History--20th century.
Princeton subject headings:
Morocco--Foreign relations--Spain.
Morocco--History.
Spain--Foreign relations--Morocco.