Columbia subject headings:
German language--Germany (East)
German language--Social aspects--Germany (East)
Germany (East)--Social conditions.
Harvard subject headings:
German language--Germany (East)
German language--Social aspects--Germany (East)
Germany (East)--Social conditions.
Princeton subject headings:
German language--Germany (East)
German language--Social aspects--Germany (East).
Germany (East)--Social conditions.