R Eugene Parta 
Discovering the Hidden Listener [PDF ebook] 
An Empirical Assessment of Radio Liberty and Western Broadcasting to the USSR during the Cold War

This overview of the impact of Western radio and Radio Liberty—from the listeners’ perspective—addresses questions of audience size and listening trends over time, listeners’ demographic traits and attitudes, and more. Based on more than 50, 000 interviews with Soviet citizens, the book sheds light on what these broadcasts meant to listeners as the USSR moved toward a freer society.