Columbia subject headings:
Bürkel, Heinrich, 1802-1869--Autographs.
Bürkel, Heinrich, 1802-1869--Correspondence.
Bürkel, Heinrich, 1802-1869.
Painters--Germany--Correspondence.
Personal correspondence.
Harvard subject headings:
Bürkel, Heinrich, 1802-1869
Bürkel, Heinrich, 1802-1869--Autographs.
Bürkel, Heinrich, 1802-1869--Correspondence.
Painters--Germany--Correspondence.
Princeton subject headings:
Bürkel, Heinrich, 1802-1869--Correspondence.
Bürkel, Heinrich, 1802-1869--Criticism and interpretation.
Painters--Germany--Correspondence.