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Principles and practice of multi-frequency telegraphy /

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Kaituhi matua: Ralphs, J. D. (John Dennis)
Kaituhi rangatōpū: Institution of Electrical Engineers
Hōputu: Pukapuka
Reo:Ingarihi
I whakaputaina: London, UK : P. Peregrinus on behalf of the Institution of Electrical Engineers, c1985.
Rangatū:IEE telecommunications series ; 11
Ngā marau:
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