Physics
Physics
HITTORF, W. (JOHANN WILHELM). - CATHODE RAYS - EARLY TELEVISION.
Ueber die Elektricitätsleitung..Leipzig, Johann Ambrosius Barth, 1869, 1874, 1879.
POULSEN, VALDEMAR. - THE INVENTION OF THE SOUND RECORDER.
Das Telegraphon.(Berlin, J.A. Barth, 1900).
COCKCROFT, J.D. & E.T.S. WALTON.
Experiments with High Velocity..London, Harrison and Sons, 1930 a. 1932.