00579naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200007900102210010800181215001100289608002700300675003000327700002500357856001500382EN\\bibl\5292120240902191556.1##a2587-9936##a20201225b2020####ek#y0engy0150####ca0#aRUS##aRU1#aInvention of an electronic tube audio frequency amplifiereJournal article1#aSevastopolcFederal State Educational Institution of Higher Education Sevastopol State Universityd2020##a22 с.##aJournal article2local##a. 621.37-621.39(091)zRUS#1aPestrikovgViktor M 4#arusjbpc.ru