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MLA Citation
Unknown. Power vacuum tubes handbook, third edition. Place of publication not identified : CRC Press, 2017. http://access.bl.uk/ark:/81055/vdc_100052742009.0x000001
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Unknown. Power vacuum tubes handbook, third edition. Place of publication not identified : CRC Press, 2017. http://access.bl.uk/ark:/81055/vdc_100052742009.0x000001