Davies Kenneth Ionospheric radio propagation - Washingtion U S Department of Commerce 1965 - xiv, 470p. ill. cm - National bureau of standerds monographs 80, Issued April 1, 1965 . Included references; Index 445p.; Author index 465-467p.; Place index 469-470p. ISBN: 000000000 (hbk) Standard No.: 201825 Source: Textual Subjects--Topical Terms: Ionospheric Oblique propagation Singnal strengthEngineering Dewey Class. No.: D666:2, K5