Columbia subject headings:
Bruch, Max, 1838-1920--Correspondence.
Spitta, Philipp, 1841-1894--Correspondence.
Harvard subject headings:
Bruch, Max, 1838-1920--Correspondence.
Spitta, Philipp, 1841-1894--Correspondence.
Princeton subject headings:
Bruch, Max, 1838-1920--Correspondence.
Composers--Germany--Correspondence.
Music--Germany--Koblenz--19th century--History and criticism--Sources.
Spitta, Philipp, 1841-1894--Correspondence.