Columbia subject headings:
Germany (East)--Politics and government.
Historians--Germany (East)--Biography.
Historiography--Germany (East)
Petzold, Joachim.
Harvard subject headings:
Germany (East)--Politics and government.
Historians--Germany (East)--Biography.
Historiography--Germany (East)
Petzold, Joachim.
Princeton subject headings:
Historians--Germany (East)--Biography.
Petzold, Joachim.