Radio phone receiving: a practical book for everybody /
Hausmann, Erich.
Goldsmith, Alfred N.
Hazeltine, Louis A.
Hogan, John V. L.
Morecroft, John H.(John Harold),1881-1934.
Canavaciol, Frank E.
Gibson, Robert D.
Hoernel, Paul C.
London, Bombay,
1922.