Columbia subject headings:
Harvard subject headings:
Freiligrath, Ferdinand, 1810-1876--Correspondence.
Freiligrath, Ferdinand, 1810-1876--Political and social views.
Germany--Politics and government--1815-1866.
Heinzen, Karl, 1809-1880--Correspondence.
Poets, German--19th century--Correspondence.
Princeton subject headings:
Freiligrath, Ferdinand, 1810-1876--Correspondence.
Freiligrath, Ferdinand, 1810-1876--Political and social views.
Germany--Politics and government--1815-1866.
Heinzen, Karl, 1809-1880--Correspondence.
Poets, German--19th century--Correspondence.