books.google.com - "This book presents the histories of the major North American shortwave clubs and reviews the professional and listener-generated shortwave literature of the era. It also covers the DX programs and other listening fare to which shortwave listeners were most attracted and the QSL-cards they sought as...http://books.google.com/books/about/Listening_on_the_Short_Waves_1945_to_Tod.html?id=ZjP978PYo0MC&utm_source=gb-gplus-shareListening on the Short Waves, 1945 to Today
