Columbia subject headings:
Art--Philosophy--Congresses.
State, The--Congresses.
State, The--Philosophy--Congresses.
Harvard subject headings:
Art--Philosophy--Congresses
State, The--Congresses
State, The--Philosophy--Congresses.
Princeton subject headings:
Art--Philosophy--Congresses.
State, The--Congresses.
State, The--Philosophy--Congresses.