Columbia subject headings:
Press, Socialist--Germany--Bibliography.
Press, Socialist--Germany--History.
Sozialdemokratische Partei Deutschlands.
Harvard subject headings:
Press, Socialist--Germany--Bibliography.
Press, Socialist--Germany--History.
Sozialdemokratische Partei Deutschlands
Princeton subject headings:
Press, Socialist--Germany--Bibliography.
Press, Socialist--Germany--History.
Sozialdemokratische Partei Deutschlands.