Deffaa has written and directed in New York such plays as George M. Cohan: In his Own Words (published by Samuel French Inc.,), Yankee Doodle Boy (Drama Source), The George M. Cohan Revue (Baker's Plays), George M. Cohan & Co. (Eldridge Plays), The Seven Little Foys, The Johnny Mercer Jamboree, and Theater Boys.
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