The observer's book on radio navigation
By: by W. J. D. Allan.
Series: Half-title:  Observers books,; no. 7
Publisher: G. Allen & Unwin ltd
Published: 1941
Place of publication: London
Language: eng
Number of pages: 106
Subjects: Radio in aeronautics.; Navigation (Aeronautics)
Other titles: Radio navigation.
Notes: "First published in 1941."