Columbia subject headings:
German letters--History and criticism.
Historians--Germany--19th century--Correspondence.
Historians--Germany--20th century--Correspondence.
Historiography--Germany--History--19th century.
Historiography--Germany--History--20th century.
Letter writing, German--History--19th century.
Letter writing, German--History--20th century.
Harvard subject headings:
German letters--History and criticism
Historians--Germany--19th century--Correspondence.
Historians--Germany--20th century--Correspondence.
Historiography--Germany--History--19th century.
Historiography--Germany--History--20th century
Letter writing, German--History--19th century.
Letter writing, German--History--20th century.
Princeton subject headings:
German letters--History and criticism.
Historians--Germany--19th century--Correspondence.
Historians--Germany--20th century--Correspondence.
Historiography--Germany--History--19th century.
Historiography--Germany--History--20th century.
Letter writing, German--History--19th century.
Letter writing, German--History--20th century.