Columbia subject headings:
Harvard subject headings:
Ideology--History--20th century
Political refugees--Germany--Saxony-Anhalt--History--20th century.
Saxony-Anhalt (Germany)--Politics and government--20th century.
Students, Foreign--Germany--Saxony-Anhalt--History--20th century.
Princeton subject headings:
Espionage--Germany--Saxony-Anhalt.
Germany (East)--Politics and government.
Refugees--Germany--Saxony-Anhalt.
Refugees--Government policy--Germany (East).
Students, Foreign--Germany--Saxony-Anhalt.
Students, Foreign--Government policy--Germany (East).