Columbia subject headings:
Harvard subject headings:
Caetano, Marcello, 1906-1980--Correspondence.
López Rodó, Laureano--Correspondence.
Politicians--Spain--Correspondence.
Prime ministers--Portugal--Correspondence.
Prime ministers--Spain--Correspondence.
Rio de Janeiro (Brazil)--Correspondence.
Princeton subject headings:
Caetano, Marcello, 1906-1980--Correspondence.
López Rodó, Laureano--Correspondence.
Politicians--Spain--Correspondence.
Prime ministers--Portugal--Correspondence.