Wireless direction finding /
Keen, R.
Eckersley, T. L.
Keen, R.Direction and position finding by wireless.
Keen, R.Wireless direction finding and directional reception.
London : Iliffe & Sons,
1938.
First ed. published as: Direction and position finding by wireless, 1922. Second ed. published as: Wireless direction finding and directional reception, 1927.
Includes bibliographical references (p. 759-787) and index.
Telegraph, Wireless.
Radio direction finders.