BUMPER STICKER: WKNR-AM ‘THE NEW RADIO 13’ 1963 WKNR-AM ‘NEW RADIO 13’ IST ISSUED BUMPER STICKER 1963-1964 THE KEY MEN OF MUSIC: WKNR MUSIC GUIDE ‘NEW RADIO 13’ NOVEMBER 14, 1963 (For more on WKNR ‘Radio 13’ in Billboard early-1964, go here).