Jim Ralph disucsses the series of 9 musicals produced at RKO Radio Pictures from 1933-37 which featured Fred Astaire and Ginger Rogers…and a magical collection of Songbook classics boasting lyrics by Gus Kahn (1886-1941), Cole Porter (1891-1964), Irving Berlin (1888-1989), Dorothy Fields (1904-74), Edward Eliscu (1902-98), Otto Harbach (1873-1963), and Ira Gershwin (1896-1983).