Columbia subject headings:
Philosophy, European--Congresses.
Science--Philosophy--Congresses.
Vienna circle--Congresses.
Harvard subject headings:
Logical positivism.
Philosophy, European--20th century.
Philosophy, European--Congresses.
Science--Philosophy
Science--Philosophy--Congresses
Vienna circle--Congresses.
Princeton subject headings:
Philosophy, European--Congresses.
Science--Philosophy--Congresses.
Vienna circle--Congresses.