Columbia subject headings:
Harvard subject headings:
Diplomats--Germany--Biography
Humboldt, Alexander von, 1769-1859--Influence.
Humboldt, Alexander von, 1769-1859.
Humboldt, Wilhelm von, 1767-1835--Influence.
Humboldt, Wilhelm von, 1767-1835.
Naturalists--Germany--Biography.
Philosophers--Germany--Biography
Scientists--Germany--Biography
Princeton subject headings:
Diplomats--Germany--Biography.
Humboldt, Alexander von, 1769-1859--Influence.
Humboldt, Alexander von, 1769-1859.
Humboldt, Wilhelm von, 1767-1835--Influence.
Humboldt, Wilhelm von, 1767-1835.
Naturalists--Germany--Biography.
Philosophers--Germany--Biography.
Scientists--Germany--Biography.