Your country needs you - Join the Navy! New Haven, Conn.: Rolf Armstrong, Artist, [1918?] [Poster].

Monographs and pamphlets relate to all combatants and are written in English, French and German. There are also ca. 300 posters, mostly American, but including 57 Soviet-era Russian posters. Some manuscript material can be found listed in Manuscripts in the Watkinson Library.