Columbia subject headings:
Harvard subject headings:
Pessoa, Fernando, 1888-1935--Correspondence.
Poets, Portuguese--20th century--Correspondence.
Sá-Carneiro, Mário de--Correspondence.
Princeton subject headings:
Pessoa, Fernando, 1888-1935--Correspondence.
Poets, Portuguese--20th century--Correspondence.
Sá-Carneiro, Mário de--Correspondence.