Top 40

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

 * Adult Top 40 (Billboard)
 * Pop Songs (Billboard)
 * UK Singles Chart
 * Dutch Top 40 (is a Dutch music chart)
 * Los 40 Principales (in Spain)
 * Ö3 Austria Top 40 (the official Austrian music chart)

Books

 * Pete Battistini, "American Top 40 with Casey Kasem The 1970s", Authorhouse.com, January 31, 2005. ISBN 1-4184-1070-5
 * Susan Douglas, Listening In: Radio and the American Imagination (New York: Times Books, 1999)
 * Ben Fong-Torres, The Hits Just Keep On Coming: The History of Top 40 Radio (San Francisco: Backbeat Books, 1998)
 * Elwood F. 'Woody' Goulart, The Mystique and Mass Persuasion: Bill Drake & Gene Chenault’s Rock and Roll Radio Programming (2006)
 * David MacFarland, The Development of the Top 40 Radio Format (New York: Arno Press, 1979)
 * Elwood F. 'Woody' Goulart, The Mystique and Mass Persuasion: Bill Drake & Gene Chenault’s Rock and Roll Radio Programming (2006)
 * David MacFarland, The Development of the Top 40 Radio Format (New York: Arno Press, 1979)

Other websites

 * Billboard Top 40 Mainstream
 * Public Radio documentary featuring a history of Top 40