Columbia subject headings:
Carus, Carl Gustav, 1789-1869--Correspondence.
Goethe, Johann Wolfgang von, 1749-1832--Correspondence.
Natural history.
Harvard subject headings:
Carus, Carl Gustav, 1789-1869--Correspondence.
Carus, Carl Gustav, 1789-1869.
Goethe, Johann Wolfgang von, 1749-1832. Correspondence.
Intellectuals--Germany--Correspondence.
Princeton subject headings:
Carus, Carl Gustav, 1789-1869--Correspondence.
Goethe, Johann Wolfgang von, 1749-1832. Correspondence.
Natural history.