Columbia subject headings:
Cooperation--France.
Cooperation--Spain.
European cooperation.
France--Boundaries--Spain.
Regional planning--European Union countries.
Spain--Boundaries--France.
Harvard subject headings:
Borderlands--Europe--Case studies.
European Union--France.
European Union--Spain.
France--Relations--Spain.
Princeton subject headings:
Cooperation--France.
Cooperation--Spain.
European cooperation.
France--Boundaries--Spain.
Regional planning--European Union countries.
Spain--Boundaries--France.