Columbia subject headings:
Harvard subject headings:
Authors and publishers--19th century--Correspondence.
Campe, Julius, 1792-1867--Correspondence.
Heine, Heinrich, 1797-1856--Correspondence.
Princeton subject headings:
Authors, German--Correspondence.
Campe, Julius, 1792-1867--Correspondence.
Heine, Heinrich, 1797-1856. Correspondence.
Publishers and publishing--Germany--Correspondence.