Columbia subject headings:
Harvard subject headings:
German language--History.
German literature--History and criticism
Germany--Genealogy.
Humboldt family.
Humboldt, Alexander von, 1769-1859.
Humboldt, Wilhelm von, 1767-1835.
Princeton subject headings:
German language--History.
German literature--History and criticism.
Germany--Genealogy.
Humboldt family.
Humboldt, Alexander von, 1769-1859.
Humboldt, Wilhelm von, 1767-1835.