In Russian. Kabakov, Vitaly Semenovich. Influence of core material and cathode temperature on operation of receiving and amplification lamps. Moscow: 1971. Vliyanie materiala kerna i temperatury katoda na rabotu priemno-usilitel'nykh lamp. In Russian /Effect of core material and cathode temperature on the operation of receiving and amplification lamps . All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU7382218