In the order of their appearance / reference in the printed text:
T.B. Townsend biography (from family archives)
Towsend Brown Autobiography (from Family Archives)
Enid Lamonte Meadocraft , The Story of Thomas Alva Edison;The Signature Books Biography (1952)
George Everson, The Story of Television: The Life of Philo T. Farnsworth; (1949)
Paul Schatzkin, The Boy Who Invented Television; 2002
A. L. Kistelman, A., Hello, Stupid; 1962
Robert A .Millikan, The Autobiograhy of Robert A. Millikan
Fenimore Johnson, His Masters Voice Was Eldridge R. Johnson
William S. Stephenson, A Man Called Intrepid
H. Montgomery Hyde, The Quiet Canadian: The Secret Service Story of Sir William Stephenson (Intrepid)