Columbia subject headings:
Harvard subject headings:
Economic assistance--Morocco.
Morocco--Foreign economic relations--Spain.
Morocco--Foreign relations--Spain.
Spain--Foreign economic relations--Morocco.
Spain--Foreign relations--Morocco.
Sustainable development--Morocco.
Sustainable development--Spain, Southern.
Princeton subject headings:
Morocco--Foreign economic relations--Spain.
Spain--Foreign economic relations--Morocco.
Sustainable development--Morocco.
Sustainable development--Spain, Southern.