Elmer Hugh Lewis

• The A B C of Vacuum Tubes in Radio Reception; an Elementary and Practical Book on the Theory and Operation of Vacuum Tubes as Detectors and ... Which all Vacuum Tube Circuits are Based. I
• a B C of Vacuum Tubes in Radio Reception
• a B C of Vacuum Tubes in Radio Reception; an Elementary and Practical Book on the Theory and Operation of Vacuum Tubes As Detectors and Amplifiers. Explains Non-Mathematically the Fundamental Principles upon Which All Vacuum Tube Circuits Are Based. I