The Hoover Institution’s propaganda collections are unrivalled in the world, beginning with its extensive poster collection and large holdings of Communist Party literature (Soviet, Chinese and other), through sound recordings and film footage (the Alexander and Ethel Pronin collection holds hundreds of reels of Soviet propaganda film), these collections allow researchers to study the techniques and perfection of propaganda from early and crude images through contemporary professional multimedia presentations. Similarly, Hoover’s holdings on psychological warfare (the Bonner Fellers papers, World War II Psychological warfare reports typescript and Psychological Warfare Branch issuances) are excellent resources for studying the development of psychological operations during the Second World War, as are the RFE/RL Broadcast and Corporate records for the Cold War era.