Columbia subject headings:
Gaya, Ramón--Correspondence.
Painters--Spain--Correspondence.
Harvard subject headings:
Authors, Spanish--20th century--Correspondence
Gaya, Ramón--Correspondence.
Painters--Spain--Correspondence.
Princeton subject headings:
Authors, Spanish--Correspondence.
Gaya, Ramón--Correspondence.
Painters--Spain--Correspondence.
Personal correspondence.