Columbia subject headings:
Authors, Russian--20th century--Autographs.
Rossiĭskai︠a︡ gosudarstvennai︠a︡ biblioteka--Catalogs.
Harvard subject headings:
Authors, Russian--20th century--Autographs--Collections.
Rossiĭskai︠a︡ gosudarstvennai︠a︡ biblioteka--Catalogs.
Princeton subject headings:
Authors, Russian--20th century--Autographs--Collections.
Rossiĭskai︠a︡ gosudarstvennai︠a︡ biblioteka--Catalogs.