Columbia subject headings:
Czechs--Germany--History--19th century.
Czechs--Germany--History--20th century.
Czechs--Germany--Rhineland--Sources.
Czechs--Germany--Westphalia--Sources.
Harvard subject headings:
Czechoslovakia--Emigration and immigration--History--Sources.
Czechs--Germany--Rhineland--History--Sources.
Czechs--Germany--Westphalia--History--Sources.
Germany--Emigration and immigration--History--Sources.
Princeton subject headings:
Czechs--Germany--History--19th century.
Czechs--Germany--History--20th century.
Czechs--Germany--Rhineland--Sources.
Czechs--Germany--Westphalia--Sources.