Columbia subject headings:
Andrade, Eugénio de--Correspondence.
Authors, Portuguese--20th century--Correspondence.
Sena, Jorge de--Correspondence.
Harvard subject headings:
Andrade, Eugénio de--Correspondence.
Authors, Portuguese--20th century--Correspondence
Sena, Jorge de--Correspondence.
Princeton subject headings:
Andrade, Eugénio de--Correspondence.
Authors, Portuguese--20th century--Correspondence.
Sena, Jorge de--Correspondence.