TransliterationAkad. N.M. Krylov i d-r N.N. Bogoljubov Novye metody nelinejnoj mehaniki v ih primenenii k izucheniju raboty jelektronnyh generatorov. Chast pervaya In Russian
In EnglishAcad. H.M. Krylov and o-r H.H. Bogolyubov New methods nonlinear mechanics in their application to study work electronic generators. Part first In Russian, Moscow
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