Interep
Provides independent national spot radio representation.
http://www.interep.com/ - Detail
Google PR

RAB Online
Information resource of the Radio Advertising Bureau, containing research, report listings, and facts & figures about the U.K. commercial radio industry.
http://www.rab.co.uk/ - Detail
Google PR

Radio Advertising Bureau
Co-op database, instant backgrounds, library of commercial copy, promotion bank, and audio radio commercials.
http://www.rab.com/ - Detail
Google PR

Radio Marketing Bureau (RMB)
Canadian center for radio advertising.
http://www.rmb.ca/ - Detail
Google PR

Radio Network
Provides radio advertising solutions with various stations in New Zealand. Includes list of radio stations, advertising solutions, and company info.
http://www.radionetwork.co.nz/ - Detail
Google PR