"Follow the yellow brick road."

“Extended audio/print interview with Ernie Harburg, Yip's son and biographer”

“A Tribute to Yip Harburg: The Man Who Put the Rainbow in the Wizard of Oz" at Democracy Now”

“E. Y. Harburg papers and E. Y. Harburg papers in the Billy Rose Theatre Collection of The New York Public Library for the Peforming Arts.”

“Yip Harburg: Secular Songwriter" by Dan Barker in Freethought Today Vol. 22, No. 3”

“The Atheist Lyricist Who Put the Rainbow in the Wizard of Oz" at Freedom From Religion Foundation”

“The Lord made Adam, the Lord made Eve, he made ‘em both a little bit naive.”