Columbia subject headings:
Authors--20th century--Correspondence.
Borgese, Giuseppe Antonio, 1882-1952--Correspondence.
Taube, Otto, Freiherr von, 1879-1973--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Authors, Italian--20th century--Correspondence
Borgese, Giuseppe Antonio, 1882-1952--Correspondence.
Taube, Otto, Freiherr von, 1879-1973--Correspondence.
Princeton subject headings:
Authors--20th century--Correspondence.
Borgese, Giuseppe Antonio, 1882-1952. Correspondence. Selections
Taube, Otto, Freiherr von, 1879-1973--Correspondence.