Columbia subject headings:
Harvard subject headings:
Germans--Czechoslovakia--History--Pictorial works.
Germany--Emigration and immigration--History--20th century.
Political refugees--Germany--History--20th century
Princeton subject headings:
Germans--Czechoslovakia--History--20th century--Pictorial works.
Germany--Emigration and immigration--History--20th century.
Political refugees--Germany--History--20th century.