| http://www.w3.org/ns/prov#value | - The book introduces, ad-hoc tailored to amateur radio, techniques used successfully by competitive athletes, including extreme sports such as free diving, adapted to the difficult process of learning telegraphy.This book is not only written for the benefit of amateur radio operators who want to learn this beautiful art, but it also meets the urgent need felt by the author to narrate his own path o
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