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Top 40

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The Top 40 is a radio format that measures the top forty songs in any music genre. The Top 40 became a dominant radio format in the 1960s, 1970s, and 1980s.

Music charts


  • Pete Battistini, "American Top 40 with Casey Kasem The 1970s",, January 31, 2005.

    Template-specific style sheet:

    ISBN 1-4184-1070-5
  • Susan Douglas, Listening In: Radio and the American Imagination (New York: Times Books, 1999)
  • Durkee, Rob (1999). American Top 40: The Countdown of the Century. New York: Schriner Books. ISBN 0-02-864895-1

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