JASIŃSKI Władysław - Podręcznik do nauki telegrafowania na aparatach morzowskim, stukawka i buzzer. Warsaw [1929]. Wyd. Dyrekcja Poczt i Telegrafów. 8, s. 197, [3]. Original cloth cover. decor.
Cover slightly rubbed, otherwise good condition. Owner's signature and notes on front pastedown. Includes parts: learning the alphabet, broadcasting technique, aural reception, aural reception on the buzzer.
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