File:The Soviet Union 1988 CPA 5921 stamp (Birth centenary of Mikhail Aleksandrovich Bonch-Bruevich, radio-frequency engineer) small resolution.jpg
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The_Soviet_Union_1988_CPA_5921_stamp_(Birth_centenary_of_Mikhail_Aleksandrovich_Bonch-Bruevich,_radio-frequency_engineer)_small_resolution.jpg (244 × 335 pixels, file size: 39 KB, MIME type: image/jpeg)