Columbia subject headings:
Harvard subject headings:
Germany--History--1990---Chronology.
Germany--History--Unification, 1990--Chronology.
Leipzig (Germany)--History--Chronology.
Protest movements--Germany--Leipzig--History--Chronology.
Princeton subject headings:
Germany--History--1990---Chronology.
Germany--History--Unification, 1990--Chronology.
Leipzig (Germany)--History--20th century--Chronology.