TransliterationNikulin N.V. Spravochnik molodogo jelektrika po jelektrotehnicheskim materialam i izdeliyam. 2-e izd., pererab. i dop. In Russian
In EnglishNikulin H.in. Directory young 6.Razvlecheniya the jelektrotehnicheskim based and products. 2-e ed., revised. and additional. In Russian, Moscow
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