Vitaphone Site
Devoted to the music, movies, and popular culture of the first progressive and liberal period of the 20th century. http://www.vitaphone.org
Vocal Group Hall of Fame
Created to honor the greatest vocal groups of the world, to preserve their music at a world-class museum, to promote their music and memories throughout the world, and to pay tribute to the inductees as National Music Treasures.
MPR: American Mavericks
Suzanne Vega hosts this 13-part radio series bringing the sounds and personalities of musical innovation in America during the 20th century.