Watson, David William Radio direction finding David William Watson and H. E. Wright - London Van Nostrand Reinhold Company 1971 - xiii+209p. biblio; figs; index; refs - Marconi Series Covering Advances in Radio and Radar . ISBN: 0-442-09227-X Subjects--Topical Terms: RadioRadiogoniometers Universal Decimal Class. No.: 621.396.933.2 / WAT