Russian tube designations (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Russian tube designations" in English language version.

refsWebsite

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2jogis-roehrenbude.de

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jeora.net

Ewert, Jürgen. "Vacuum Tube Numbering Schemes, Bases & Bulbs".

jogis-roehrenbude.de

"Die Geschichte der Russischen Roehren" (in German).
"ОТЕЧЕСТВЕННЫЕ ЛАМПЫ" [DOMESTIC TUBES] (PDF) (in Russian).

pocnet.net

frank.pocnet.net

Georgescu, Aurel; Golea, Ion (1956). "Catalog De Tuburi Electronice" (PDF) (in Romanian). Editura Tehnikă Bukurești. Retrieved 10 September 2017.