Columbia subject headings:
Guasta, Eugenio, 1927---Correspondence.
Oliver, María Rosa, 1898-1977--Correspondence.
Harvard subject headings:
Guasta, Eugenio, 1927---Correspondence.
Oliver, María Rosa, 1898-1977--Correspondence.
Princeton subject headings:
Guasta, Eugenio, 1927---Correspondence.
Oliver, María Rosa, 1898-1977--Correspondence.