Columbia subject headings:
Harvard subject headings:
Civilization, Modern--19th century
Civilization, Modern--20th century
Germany--Social conditions.
Peukert, Detlev--Bibliography.
Social history--19th century
Social history--20th century
Princeton subject headings:
Germany--Civilization--20th century.
Germany--History--20th century.
Germany--Social conditions--20th century.
Peukert, Detlev.