Columbia subject headings:
Authors, Spanish--19th century--Correspondence.
Laverde Ruiz, Gumersindo, 1835-1890--Correspondence.
Spain--Intellectual life--19th century.
Valera, Juan, 1824-1905--Correspondence.
Harvard subject headings:
Authors, Spanish--19th century--Correspondence
Laverde Ruiz, Gumersindo, 1835-1890--Correspondence.
Spain--Intellectual life--19th century.
Valera, Juan, 1824-1905. Correspondence
Princeton subject headings: