Columbia subject headings:
Wagner, Richard, 1813-1883--Anniversaries, etc.
Wagner, Richard, 1813-1883--Congresses.
Harvard subject headings:
Wagner, Richard, 1813-1883--Congresses.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Princeton subject headings:
Wagner, Richard, 1813-1883--Anniversaries, etc., 1983.
Wagner, Richard, 1813-1883--Congresses.