Radio phone receiving

By Erich Hausmann, Hazeltine, Louis Alan, Goldsmith, Alfred N. (Alfred Norton), 1888-1974, Hogan, John V. L. (John Vincent Lawless), 1890-, Morecroft, John H. (John Harold), 1881-1934, Canavaciol, Frank Emanuel, Gibson, Robert D., Hoernel, Paul C.