Columbia subject headings:
Harvard subject headings:
Bartsch, Karl, 1832-1888--Correspondence.
Paris, Gaston Bruno Paulin, 1839-1903--Correspondence.
Philologists--France--Correspondence.
Philologists--Germany--Correspondence.
Princeton subject headings:
Bartsch, Karl, 1832-1888--Correspondence.
Paris, Gaston Bruno Paulin, 1839-1903--Correspondence.
Philologists--Germany--Correspondence.
Romanicists--France--Correspondence.