Caryl Brahms and Ned Sherrin.Song by Song: 14 Great Lyric Writers. England: Ross Anderson Publications, 1984. Chapter 8: "E.Y. Harburg: Somewhere Over the Rainbow," p. 118.
Caryl Flinn. Brass Diva: The Life and Legends of Ethel Merman. University of California Press, 2007. Provides details about the Paramount-Astoria film shorts in which Merman sang songs with lyrics by Yip
John Fricke, Jay Scarfone, and William Stillman. The Wizard of Oz: The Official 50th Anniversary Pictorial History. Introduction by Jack Haley, Jr. Warner, 1989.
Will Friedwald. Stardust Memories: A Biography of Twelve of America's Most Popular Songs. NY: Pantheon, 2002. Includes a chapter (p. 142) that describes how Yip helped composer Johnny Green and lyricist Edward Heymann create the lyric to their classic, "Body and Soul."
Philip Furia and Michael Lasser. America's Songs: The Stories Behind the Songs of Broadway, Hollywood and Tin Pan Alley. Routledge, 2006. Contains a section on "Brother, Can You Spare a Dime?"
Philip Furia. The Poets of Tin Pan Alley: A History of America's Great Lyricists. NY: Oxford University Press, 1990, 1992. Chapter 9: "Paper Moons: Howard Dietz and Yip Harburg."