Spangenberg, Karl Rudolph, 1910-1964. The production and control of electron beams / by Karl Spangenberg, Lester M. Field and Robert Helm.

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Spangenberg, Karl Rudolph, 1910-1964.

The production and control of electron beams / by Karl Spangenberg, Lester M. Field and Robert Helm.

Electron beams

1942.