Columbia subject headings:
Composers--France--Correspondence.
Dyck, Ernest van--Correspondence.
Massenet, Jules, 1842-1912--Correspondence.
Tenors (Singers)--France--Correspondence.
Harvard subject headings:
Composers--France--Correspondence
Dyck, Ernest van--Correspondence.
Dyck, Ernest van--Friends and associates.
Librettists--Belgium--Correspondence.
Massenet, Jules, 1842-1912--Correspondence.
Massenet, Jules, 1842-1912--Friends and associates.
Tenors (Singers)--Belgium--Correspondence.
Tenors (Singers)--France--Correspondence.
Princeton subject headings:
Composers--France--Correspondence.
Dyck, Ernest van--Correspondence.
Massenet, Jules, 1842-1912--Correspondence.
Tenors (Singers)--France--Correspondence.