Columbia subject headings:
Harvard subject headings:
Continuity--Congresses.
Historiography--Congresses
History--Philosophy--Congresses
Planning--History--Congresses.
Progress--History--Congresses.
Repetition (Philosophy)--Congresses.
Princeton subject headings:
Continuity--Congresses.
Historiography--Congresses.
History--Philosophy--Congresses.
Planning--History--Congresses.
Progress--History--Congresses.
Repetition (Philosophy)--Congresses.