Columbia subject headings:
Harvard subject headings:
Authors, Spanish--19th century--Correspondence
Azaña, Manuel, 1880-1940--Correspondence.
Presidents--Spain--Correspondence.
Rivas Cherif, Cipriano de, 1891-1967--Correspondence.
Princeton subject headings:
Authors, Spanish--20th century--Correspondence.
Azaña, Manuel, 1880-1940--Correspondence.
Rivas Cherif, Cipriano de, 1891-1967--Correspondence.