1. Agents of power: The media and public policy;Altschull,1995
2. The media monopoly;Bagdikian,1992
3. ProQuest Direct: Document delivery [with images] to the desktop;Basch;Online,1996
4. Who owns the media?: Concentration of ownership in the mass communications industry;Compaine,1979
5. Browsing as a means of on-line text retrieval;Cove;Information Services & Use,1987