Columbia subject headings:
Poets, Czech--20th century--Correspondence.
Wolker, Jiří, 1900-1924--Correspondence.
Harvard subject headings:
Authors, Czech--20th century--Correspondence.
Wolker, Jiří, 1900-1924--Correspondence.
Princeton subject headings:
Poets, Czech--20th century--Correspondence.
Wolker, Jiří, 1900-1924--Correspondence.