Columbia subject headings:
Fichte, Johann Gottlieb, 1762-1814.
Humboldt, Wilhelm von, 1767-1835.
Harvard subject headings:
Fichte, Johann Gottlieb, 1762-1814.
Humboldt, Wilhelm von, 1767-1835.
Princeton subject headings:
Fichte, Johann Gottlieb, 1762-1814.
Humboldt, Wilhelm von, 1767-1835.