Columbia subject headings:
Humboldt, Alexander von, 1769-1859.
Harvard subject headings:
Humboldt, Alexander von, 1769-1859--Congresses.
Humboldt, Alexander von, 1769-1859--Views on Latin America--Congresses.
Princeton subject headings:
Humboldt, Alexander von, 1769-1859--Congresses.
Humboldt, Alexander von, 1769-1859--Views on Latin America--Congresses.