Columbia subject headings:
Harvard subject headings:
Latvia--History--1918-1940.
Latvia--History--1940-1991.
Latvia--History--1991-
Latvia--Politics and government--1918-1940.
Latvia--Politics and government--1940-1991.
Latvia--Politics and government--1991-
Princeton subject headings:
Latvia--History--1918-1940.
Latvia--History--1940-1991.
Latvia--History--1991-
Latvia--Politics and government--1918-1940.
Latvia--Politics and government--1940-1991.
Latvia--Politics and government--1991-