Book excerpt: In this revised, expanded and corrected edition, the acclaimed Encyclopedia of American Radio, 1920-1960 (Booklist Editors' Choice; "recommended"--Library Journal) offers even better coverage of the performers and programming on American radio from its inception to its golden age. This work is the definitive source for scholars of communication, social and cultural history and the popular arts, as well as devoted fans of radio history. New entries include information on such fascinating topics as gender discrimination in radio; holidays on the airwaves; husband and wife teams; minstrel shows, vaudeville, and burlesque; Scopes "monkey" trial broadcasts; and super heroes. Also included is additional information on broadcasters of the twenties, thirties, and forties, as well as on unique entertainers ranging from astrologists and musical saw soloists to yodelers and whistlers. These new additions offer even fuller understanding of radio's important role in American social and cultural history.