Columbia subject headings:
Harvard subject headings:
Adult education--Poland--Lwówek Śląski--History--20th century.
Anti-Nazi movement--Poland--Lwówek Śląski.
Boberhaus.
Germans--Education--Poland--Lwówek Śląski--History--20th century.
Lwówek Śląski (Poland)--History--20th century.
Nationalism and education--Germany--History--20th century.
Youth movements--Germany--History--20th century.
Princeton subject headings:
Boberhaus.
Education--Silesia, Lower (Poland and Germany)--History--20th century .
Nationalism--Germany.