Columbia subject headings:
Casella, Alfredo, 1883-1947--Correspondence.
Casella, Alfredo, 1883-1947--Criticism and interpretation.
Composers--Italy--Correspondence.
Musicologists--Italy--Correspondence.
Rognoni, Luigi--Correspondence.
Harvard subject headings:
Casella, Alfredo, 1883-1947--Correspondence.
Casella, Alfredo, 1883-1947--Criticism and interpretation.
Composers--Italy--Correspondence
Musicologists--Italy--Correspondence.
Rognoni, Luigi--Correspondence.
Princeton subject headings:
Casella, Alfredo, 1883-1947--Correspondence.
Casella, Alfredo, 1883-1947--Criticism and interpretation.
Rognoni, Luigi--Correspondence.