The collection consists of leaflets, postcards and bookmarks dropped by airplane and balloon by the French, British and Germans on France, Belgium and Germany during World War I. References to their listings in Klaus Kirchner’s Flugblatt-Propaganda is provided in the finding aid. Some of the leaflets are quite rare. The collection also contained some periodicals. Both La Lettre du soldat à ceux du pays envahi and Lettres à tous le Français have been removed and catalogued for Archives and Research Collections periodical collection. Issues of one periodical, La Libre Belgique, remain with this collection as Archives and Research Collections periodical collection already has a full run.