Columbia subject headings:
Harvard subject headings:
Czechoslovakia--History--Intervention, 1968.
Czechoslovakia--Politics and government--1968-1989.
Germany (East)--History.
Social historians--Germany (East)--Diaries.
Zwahr, Hartmut--Diaries.
Princeton subject headings:
Czechoslovakia--History--Intervention, 1968.
Czechoslovakia--Politics and government--1968-1989.
Diaries.
Social historians--Germany (East)--Diaries.
Zwahr, Hartmut--Diaries.