Columbia subject headings:
Poets, Spanish--20th century--Correspondence.
Rueda, Salvador, 1857-1933--Correspondence.
Harvard subject headings:
Authors, Spanish--19th century--Correspondence
Authors, Spanish--20th century--Correspondence
Poets, Spanish--19th century--Correspondence.
Poets, Spanish--20th century--Correspondence.
Rueda, Salvador, 1857-1933--Correspondence.
Princeton subject headings: