Columbia subject headings:
Li︠u︡bishchev, A. A. (Aleksandr Aleksandrovich), 1890-1972--Congresses.
Science--Philosophy--Congresses.
Harvard subject headings:
Li͡ubishchev, A. A. (Aleksandr Aleksandrovich), 1890-1972--Congresses.
Science--Philosophy--Congresses
Princeton subject headings:
Li︠u︡bishchev, A. A. (Aleksandr Aleksandrovich), 1890-1972--Congresses.
Science--Philosophy--Congresses.