Небольшая книга 20x20 (объем 40 стр.) о Гульельмо Маркони - итальянском радиотехнике и предпринимателе и лауреате Нобелевской премии по физике за 1909 год.

20x20 small book (40 pages) about Guglielmo Marconi, Italian inventor and electrical engineer, known for his pioneering work on long-distance radio transmission, development of Marconi's law, and a radio telegraph system. He is credited as the inventor of radio and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".