Columbia subject headings:
Harvard subject headings:
European Union
European Union countries--Economic integration.
European Union countries--Foreign relations--Germany.
European Union countries--Foreign relations--Netherlands.
European Union countries--Foreign relations.
European Union countries--Politics and government.
European federation--History
Germany--Foreign relations--European Union countries.
Germany--Politics and government--20th century
Germany--Politics and government--21st century.
Netherlands--Foreign relations--European Union countries.
Netherlands--Politics and government--20th century.
Netherlands--Politics and government--21st century.
Princeton subject headings:
European Union countries--Economic integration.
European Union countries--Foreign relations--Germany.
European Union countries--Foreign relations--Netherlands.
European Union--Economic integration.
European Union--Politics and government.
European federation--History.
Germany--Foreign relations--European Union countries.
Germany--Politics and government--20th century.
Germany--Politics and government--21st century.
Netherlands--Foreign relations--European Union countries.
Netherlands--Politics and government--20th century.
Netherlands--Politics and government--21st century.