Columbia subject headings:
Bettinelli, Saverio, 1718-1808--Correspondence.
Casanova, Giacomo, 1725-1798--Correspondence.
Voltaire, 1694-1778--Correspondence.
Harvard subject headings:
Bettinelli, Saverio, 1718-1808--Criticism and interpretation.
Casanova, Giacomo, 1725-1798--Criticism and interpretation.
Voltaire, 1694-1778--Criticism and interpretation.
Princeton subject headings:
Bettinelli, Saverio, 1718-1808--Correspondence.
Casanova, Giacomo, 1725-1798--Correspondence.
Voltaire, 1694-1778. Correspondence.