The changing face of commercial radio . . . and the influence of online radio on audiences - 2 views
http://www.audiographics.com/agd/041912-1.htm This is how other media is effecting commercial "free" radio.
http://www.audiographics.com/agd/041912-1.htm This is how other media is effecting commercial "free" radio.
http://seekingalpha.com/article/69591-inside-the-radio-industry-the-good-the-bad-and-the-ugly Some cool stats on radio, which are frequently closely held secrets