Columbia subject headings:
Authors, Danish--20th century--Correspondence.
Authors, Russian--20th century--Correspondence.
Bryusov, Valery Yakovlevich, 1873-1924--Correspondence.
Madelung, Aage, 1872-1949--Correspondence.
Remizov, Alekseĭ, 1877-1957--Correspondence.
Harvard subject headings:
Authors, Danish--20th century--Correspondence
Authors, Russian--20th century--Correspondence
Bryusov, Valery Yakovlevich, 1873-1924--Correspondence.
Madelung, Aage, 1872-1949--Correspondence.
Remizov, Alekseĭ, 1877-1957. Correspondence
Princeton subject headings:
Authors, Danish--20th century--Correspondence.
Authors, Russian--20th century--Correspondence.
Bryusov, Valery Yakovlevich, 1873-1924--Correspondence.
Madelung, Aage, 1872-1949--Correspondence.
Remizov, Alekseĭ, 1877-1957. Correspondence.