ISBN-13: 9786139831487 / Angielski / Miękka / 2018 / 136 str.
The first book ever published on the history of thermionic valve and kinescope-making in Brazil. In its chapters the book covers firstly the valve as an imported technology and the factors which pressed the local and foreign enterprises to start a long-term nationalization project for its manufacturing, which consequently led to the local industrialization of kinescopes considering the boom of television transmissions started in the country in 1950.