Columbia subject headings:
Denmark--Foreign economic relations--Sweden.
Regional planning--Denmark.
Regional planning--Sweden.
Regionalism--Denmark.
Regionalism--Sweden.
Scandinavia--Economic integration.
Sound, The, Region (Denmark and Sweden)--Economic conditions.
Sweden--Foreign economic relations--Denmark.
Harvard subject headings:
Regional planning--Denmark.
Regional planning--Sweden.
Regionalism--Denmark.
Regionalism--Sweden.
Sound, The (Denmark and Sweden)--Economic conditions.
Princeton subject headings:
Regionalism--Denmark.
Regionalism--Sweden.
Sound, The (Denmark and Sweden)--Economic conditions.