Columbia subject headings:
Immigrants--Oder River--History--20th century.
Poland--History--1945-1980.
Harvard subject headings:
Poland--History--1945-1980
Polish people--Poland--Western and Northern Territories--Biography.
Polish people--Poland--Western and Northern Territories--History.
Princeton subject headings:
Poland--History--1945-1980.
Polish people--Poland--Western and Northern Territories--Biography.
Polish people--Poland--Western and Northern Territories--History.