Columbia subject headings:
Archaeology--History--19th century--Congresses.
Etruscans--Congresses.
Fibula Praenestina--Congresses.
Helbig, Wolfgang, 1839-1915--Congresses.
Harvard subject headings:
Archaeologists--Germany--Congresses.
Archaeology--Italy--History--19th century--Congresses.
Helbig, Wolfgang, 1839-1915--Congresses.
Princeton subject headings: