Columbia subject headings:
Authors, German--19th century--Correspondence.
Petersen, Wilhelm, 1835-1900.
Schleswig (Germany)--Officials and employees--Correspondence.
Storm, Theodor, 1817-1888--Correspondence.
Harvard subject headings:
Authors, German--19th century--Correspondence
Petersen, Wilhelm, 1835-1900.
Schleswig (Germany)--Officials and employees--Correspondence.
Storm, Theodor, 1817-1888--Correspondence.
Princeton subject headings:
Authors, German--19th century--Correspondence.
Petersen, Wilhelm, 1835-1900.
Schleswig (Germany)--Officials and employees--Correspondence.
Storm, Theodor, 1817-1888--Correspondence.