Columbia subject headings:
Bogdanov, A. (Aleksandr), 1873-1928--Criticism and interpretation--Congresses.
Philosophy, Russian--20th century--Congresses.
Harvard subject headings:
Bogdanov, A. (Aleksandr), 1873-1928--Criticism and interpretation--Congresses.
Philosophy, Russian--20th century--Congresses.
Princeton subject headings:
Bogdanov, A. (Aleksandr), 1873-1928--Criticism and interpretation--Congresses.
Philosophy, Russian--20th century--Congresses.