Columbia subject headings:
Harvard subject headings:
Cotta von Cottendorf, Johann Georg, Freiherr von, 1796-1863--Correspondence.
Humboldt, Alexander von, 1769-1859--Correspondence.
Publishers and publishing--Germany--Correspondence
Scientists--Germany--Correspondence.
Princeton subject headings:
Cotta von Cottendorf, Johann Georg, Freiherr von, 1796-1863--Correspondence.
Cotta, Johann Friedrich, Freiherr von, 1764-1832--Correspondence.
Humboldt, Alexander von, 1769-1859--Correspondence.
Personal correspondence.
Publishers and publishing--Germany--Correspondence.
Scientists--Germany--Correspondence.