Columbia subject headings:
Press, Socialist--Germany--History.
Social legislation--Germany--History.
Sozialdemokratische Partei Deutschlands--History.
Harvard subject headings:
Government and the press--Germany--History--19th century.
Press law--Germany.
Press, Socialist--Germany--History--19th century.
Princeton subject headings:
Press, Socialist--Germany--History.
Social legislation--Germany--History.
Sozialdemokratische Partei Deutschlands--History.