Columbia subject headings:
Authors, Russian--20th century--Congresses.
T︠S︡vetaeva, Marina, 1892-1941--Congresses.
Harvard subject headings:
T︠S︡vetaeva, Marina, 1892-1941--Criticism and interpretation--Congresses.
Princeton subject headings:
T︠S︡vetaeva, Marina, 1892-1941--Criticism and interpretation--Congresses.