English conductor Dale Clevenger was a member of Leopold Stokowski's American Symphony Orchestra and the Symphony of the Air directed by who?
Dale Clevenger:  Before joining the CSO, he was a member of Leopold Stokowski's American Symphony Orchestra and the Symphony of the Air directed by Alfred Wallenstein. Leopold Stokowski: Leopold Anthony Stokowski (18 April 188213 September 1977) was an English conductor of Jewish-Polish and Irish descent.
Alfred Wallenstein