Columbia subject headings:
Admission of nonimmigrants--European Economic Community countries.
Law enforcement--European Economic Community countries.
Schengen Agreement
Schengen Convention
Harvard subject headings:
Princeton subject headings:
Admission of nonimmigrants--European Economic Community countries.
Law enforcement--European Economic Community countries.
Noncitizens--European Economic Community countries.
Refugees--Legal status, laws, etc.--European Economic Community countries.
Schengen Agreement
Schengen Convention