Columbia subject headings:
Composers--Correspondence.
Hasse, Johann Adolf, 1699-1783--Correspondence.
Ortes, Giammaria, 1713-1790--Correspondence.
Harvard subject headings:
Composers--Correspondence
Hasse, Johann Adolf, 1699-1783--Correspondence.
Ortes, Giammaria, 1713-1790--Correspondence.
Princeton subject headings:
Composers--Correspondence.
Economists--Italy--Correspondence.
Hasse, Johann Adolf, 1699-1783--Correspondence.
Ortes, Giammaria, 1713-1790--Correspondence.