Libraries could subscribe to the service and make selections from lists sent by LoC. LoC had a special arrangement with the Central Intelligence Agency (CIA) to distribute CIA reference aids, which consist of things such as posters of communist leaders of various countries.
Libraries could enroll in the service and choose titles from catalogs dispatched by LoC. LoC had a special collaboration with the Central Intelligence Agency (CIA) to circulate reference aids, including visual materials like posters highlighting communist leaders from different countries.