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PBS
Pbs: People and Discoveries: Kdka Begins to Broadcast 1920
This site from PBS details the history of radio and KDKA (Pittsburgh, Pennsylvania) the first radio station to offer programming. Mentions: advertising, NBC Radio, mass culture.
University of Houston
University of Houston: Engines of Our Ingenuity: No. 1362: Flying Across the Atlantic
Article discussing the early flights across the Atlantic. This is a transcript of an accompanying radio broadcast.
Stanford University
Riverwalk Jazz: Speakeasies, Flappers, and Red Hot Jazz: Music of Prohibition
Script of a radio broadcast about Prohibition and Jazz Age America comments on black market bootlegging, jazz music, speakeasies, flappers, and women`s suffrage.