Columbia subject headings:
Citizenship--Germany (East)
Citizenship--Germany (West)
Citizenship--Poland.
Germans--Legal status, laws, etc.--Poland.
Harvard subject headings:
Citizenship--Germany (East)
Citizenship--Germany (West)
Citizenship--Poland.
Germans--Legal status, laws, etc.--Poland.
Princeton subject headings:
Citizenship--Germany (West)
Citizenship.
Germany (East)--Relations--Germany (West)
Germany (West)--Relations--Germany (East)
Germany (West)--Relations--Poland.
Poland--Relations--Germany (West).