United States. National Bureau of Standards. Electron physics. Proceedings of the NBS semicentennial Symposium on Electron Physics, held at the NBS on November 5-7, 1951.

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United States. National Bureau of Standards.

Electron physics. Proceedings of the NBS semicentennial Symposium on Electron Physics, held at the NBS on November 5-7, 1951.

Electron optics.

Electronics.