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<![CDATA[NCRA-SIRC Search for 'su:Vacuum-tubes.']]> /cgi-bin/koha/opac-search.pl?q=ccl=su%3AVacuum-tubes.&format=rss2 3 0 20 Thermionic valves, ISBN /cgi-bin/koha/opac-detail.pl?biblionumber=210 By Beck, A. H. W.. Cambridge [Eng.] University Press, 1953 . 570 p. 22 cm..

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]]> /cgi-bin/koha/opac-detail.pl?biblionumber=210 Velocity-modulated thermionic tubes ... ISBN /cgi-bin/koha/opac-detail.pl?biblionumber=211 By Beck, A. H. W.. Cambridge [Eng.] University Press, 1948 . x, 180 p. : 22 cm..

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]]> /cgi-bin/koha/opac-detail.pl?biblionumber=211 RCA receiving tube manual. ISBN /cgi-bin/koha/opac-detail.pl?biblionumber=282 Harrison, N.J. [n.d.] . v. , Serial. 21-23 cm..

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