Columbia subject headings:
Harvard subject headings:
Germans--Europe, Eastern--Economic conditions.
Germans--Europe, Eastern--History--19th century.
Germans--Europe, Eastern--History--20th century
Germans--Europe, Eastern--Intellectual life.
Germans--Europe, Eastern--Social life and customs.
Prussia (Germany)--Social life and customs.
Princeton subject headings:
Germans--Foreign countries--History--19th century.
Germans--Foreign countries--History--20th century.
Germany--Emigration and immigration--History--19th century.
Germany--Emigration and immigration--History--20th century.
Refugees--Germany--History--19th century.
Refugees--Germany--History--20th century.