Radio valve data

Receiving tube substitution guide book Middleton, Herman Arnold. [from old catalog] How tubes and transistors amplify Gillie, Angelo C. [from old catalog] Vacuum Tubes R. Spangenberg, Karl Vacuum tubes Spangenberg, Karl R. Electronic control of resistance welding Chute, George M. Noise Van der Ziel, Aldert Vacuum and solid state electronics Harris, D. J. Vacuum and solid state electronics Harris, Douglas James