<Li> If I Only had the Nerve--Cowardly Lion (Bert Lahr) </Li> <Li> Optimistic Voices--unseen chorus </Li> <Li> The Merry Old Land of Oz--Frank Morgan / Judy Garland / Ray Bolger / Bert Lahr / Jack Haley / Citizens of the Emerald City </Li> <Li> If I Were King of the Forest--Bert Lahr / Judy Garland / Ray Bolger / Jack Haley </Li>

Who wrote the music for the wizard of oz