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23 November 2017
21 November 2017
- (diff | hist) . . m Morse code; 14:16 . . (+60) . . Zelchenko (→Development and history)
- (diff | hist) . . Morse code; 14:14 . . (+637) . . Zelchenko (→Development and history: Place Morse, Gauss, Weber developments in context with previous 40 years of experimentation. It didn't begin with Gauss and Weber.)