Alexander Popov inventor of radio /
Radovski, M. I.
Alexander Popov inventor of radio / M. I. Radovski - Moscú : Foreing Languages Publishing House, 1957 - 129 p. ; 20 cm.
Popov, Aleksandr Slepanovich, 1859-1906
TK 6545 R33
Alexander Popov inventor of radio / M. I. Radovski - Moscú : Foreing Languages Publishing House, 1957 - 129 p. ; 20 cm.
Popov, Aleksandr Slepanovich, 1859-1906
TK 6545 R33