Columbia subject headings:
Harvard subject headings:
Authors, Spanish--19th century--Correspondence
Costa y Martínez, Joaquín, 1846-1911--Correspondence.
Giner de los Ríos, Francisco, 1839-1915--Correspondence.
Intellectuals--Spain--Correspondence.
Princeton subject headings:
Authors, Spanish--19th century--Correspondence.
Costa y Martínez, Joaquín, 1846-1911--Correspondence.
Giner de los Ríos, Francisco, 1839-1915--Correspondence.
Intellectuals--Spain--Correspondence.