Power vacuum tubes handbook by Whitaker, Jerry C.

Also available online for University of the Philippines Diliman College of Engineering via CRCnetBASE. Click here to access
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Electronic tubes, circuits and devices by Blevins, Lewis G.

Philco handbook of tubes and semiconductors

Basic vacuum tubes and their uses by Rider, John Francis, 1900-

Noise by Van der Ziel, Aldert

Physics and applications of secondary electron emission. by Bruining, H.

Vacuum tubes by Spangenberg, Karl Ralph

Fundamental electronics and vacuum tubes by Albert, Arthur Lemuel, 1899-

Electronic control of resistance welding by Chute, George M.

Electric motors in industry by Shoults, David Roy