| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Held in de Lucht. English | Boelcke, Oswald, 1891-1916 | en | Hirsch, Robert Reynold [Translator] | Boelcke, Oswald, 1891-1916; World War, 1914-1918 -- Aerial operations; World War, 1914-1918 -- Personal narratives, German | 2009-09-17 |