Columbia subject headings:
Wellesz, Egon, 1885-1974--Criticism and interpretation.
Harvard subject headings:
Wellesz, Egon, 1885-1974--Criticism and interpretation.
Princeton subject headings:
Composers--Austria--Biography.
Österreichische Nationalbibliothek. Musiksammlung--Records and correspondence.
Wellesz, Egon, 1885-1974--Correspondence.
Wellesz, Egon, 1885-1974--Criticism and interpretation.