Listed below are Internet searches to use to develop a topic for a research project, paper, thesis, or dissertation.
Not every reference is relevant, but there should be several things to provide a start.
 

General Mass Media
Search One
Search Two
Search Three
Search Four

Radio
Search One
Search Two
Search Three
Search Four

Television
Search One
Search Two
Search Three
Search Four

Advertising
Search One
Search Two
Search Three
Search Four

Public Relations
Search One
Search Two
Search Three
Search Four

Internet
Search One
Search Two
Search Three
Search Four

Research Methods
Search One
Search Two
Search Three
Search Four

Mass Media Research: An Introduction, 8th Edition, Home Page