Columbia subject headings:
Germans--Europe, Eastern--History.
Germans--Poland--History.
Prussia (Germany)--Emigration and immigration.
Harvard subject headings:
Germans--Poland
Germany--Emigration and immigration.
Land settlement--Political aspects--Germany.
Prussia (Germany)--Emigration and immigration.
Princeton subject headings:
Ethnology--Europe, Eastern.
Europe, Eastern--Civilization.
Germans--Europe, Eastern.