Columbia subject headings:
Harvard subject headings:
Blumenbach, Johann Friedrich, 1752-1840
Lectures and lecturing--Germany--History.
Schopenhauer, Arthur, 1788-1860
Science--Philosophy
Princeton subject headings:
Blumenbach, Johann Friedrich, 1752-1840.
Lectures and lecturing--Germany--History.
Schopenhauer, Arthur, 1788-1860.
Science--Philosophy.