Danielson, G. L..
Radio and Line Transmission / vol. 1 Danielson G. L., Walker R. S.. - 2 edition. - London : Iliffe, 1969. - 283 s.; 25 cm.
Radio and Line Transmission / vol. 1 Danielson G. L., Walker R. S.. - 2 edition. - London : Iliffe, 1969. - 283 s.; 25 cm.