Columbia subject headings:
Emblems--Congresses.
Harvard subject headings:
Emblems in art--History--Philosophy--Congresses.
Emblems in art--Philosophy--Congresses.
Emblems in literature--History--Philosophy--Congresses.
Emblems--History--Philosophy--Congresses.
Emblems--Philosophy--Congresses.
Language and languages--Philosophy--Congresses
Princeton subject headings:
Emblems--Congresses.