"The Aeronautical Society [ ] elected for the ensuing year [:] director[:] Charles R. Wittemann"

NY Sun, February 14, 1913

New York Herald, March 27, 1913

"Mr. Wittemann has long been a member of the Aeronautical Society of this City."

Charles R. Wittmann's Aviation Hall of Fame induction

Obituary, New York Times, July 9, 1967