Columbia subject headings:
Barrios Fernández, Angel--Correspondence.
Composers--Spain--Correspondence.
Falla, Manuel de, 1876-1946--Correspondence.
Harvard subject headings:
Barrios Fernández, Angel--Correspondence.
Composers--Spain--Correspondence.
Falla, Manuel de, 1876-1946--Correspondence.
Princeton subject headings:
Barrios Fernández, Angel--Correspondence.
Composers--Spain--Correspondence.
Falla, Manuel de, 1876-1946--Correspondence.
Personal correspondence.