• 4 Memorial Library

• 4 Books

• 3 Humboldt, Alexander von, 1769-1859
• 2 Scientists
• 1 Bülow, Gabriele von
• 1 Cotta von Cottendorf, Johann Georg, Freiherr von, 1796-1863
• 1 Cotta, Johann Friedrich, Freiherr von, 1764-1832
• 1 Description and travel
• 1 Discovery and exploration
• 1 Frederick William IV, King of Prussia, 1795-1861
• 1 Humboldt, Alexander von 1769-1869
• 1 Kings and rulers
• 1 Publishers and publishing
• 1 Scientific expeditions

• 3 Knobloch, Eberhard
• 1 Bülow, Gabriele von
• 1 Frederick William IV, King of Prussia, 1795-1861
• 1 Holtz, Bärbel

• 4 German
• 1 French

• 2 Germany
• 1 Latin America
• 1 Mexico
• 1 Prussia (Germany)

• 3 Correspondence
• 1 Diaries

Limit year range