Columbia subject headings:
Harvard subject headings:
Humanities--Bibliography.
Learning and scholarship--Germany (East)--History--20th century.
Learning and scholarship--Germany (East)--History--21st century.
Social sciences--Bibliography
Princeton subject headings:
Humanities--Bibliography.
Learning and scholarship--Germany (East)--History--20th century.
Learning and scholarship--Germany (East)--History--21st century.
Social sciences--Bibliography.