| title | creator | language | description | tableOfContents | contributor | subject | created |
| Ideen zu einer Physiognomik der Gewächse | Humboldt, Alexander von, 1769-1859 | de | | | | Phytogeography; Plant ecology | 2007-09-24 |
| Reise in die Aequinoctial-Gegenden des neuen Continents. Band 3. | Humboldt, Alexander von, 1769-1859 | de | | | | Natural history -- South America; South America -- Description and travel | 2009-03-08 |
| Reise in die Aequinoctial-Gegenden des neuen Continents. Band 1. | Humboldt, Alexander von, 1769-1859 | de | | | | South America -- Description and travel; South America -- History; Natural history -- South America; Geology -- South America | 2007-09-03 |
| Reise in die Aequinoctial-Gegenden des neuen Continents. Band 2. | Humboldt, Alexander von, 1769-1859 | de | | | | South America -- Description and travel; South America -- History; Natural history -- South America; Geology -- South America | 2008-03-03 |
| Rede, gehalten bei der Eröffnung der Versammlung deutscher Naturforscher und Ärzte in Berlin, am 18. September 1828 | Humboldt, Alexander von, 1769-1859 | de | | | | | 2007-09-18 |