Columbia subject headings:
Merkel family.
Middle class--Germany--History--18th century.
Middle class--Germany--History--19th century.
Roth family.
Harvard subject headings:
Merkel family.
Middle class--Germany--History--18th century.
Middle class--Germany--History--19th century.
Roth family.
Princeton subject headings:
Merkel family.
Middle class--Germany--History--18th century.
Middle class--Germany--History--19th century.
Roth family.