Columbia subject headings:
Harvard subject headings:
Civilization, Classical--Congresses
Classical philology--Congresses.
Classical philology--Study and teaching--Germany--History--19th century--Congresses.
Welcker, Friedrich Gottlieb, 1784-1868--Congresses.
Princeton subject headings:
Welcker, Friedrich Gottlieb, 1784-1868--Criticism and interpretation.