Радиосвязь
Материалы по теме
The inventor of the radio AS Popov
Inventor of Radio A. S. Popov. 1950. |
AS Popov - the great Russian scientist and inventor of radio
AS Popov is a great Russian scientist and inventor of radio. 1959. |
Inventor of Radio A. S. Popov. 1950. |
AS Popov is a great Russian scientist and inventor of radio. 1959. |