Danielson,G.L. Radio and line transmission/ G.L.Danielson. - 2nd ed. - London: . ELBS, c 1970. - ix,283 p. ill, table,figs, photos, 21 cm. - vol -1 . Includes Index. English Subjects--Topical Terms: Radio Engineering, transmisstion. Dewey Class. No.: 621.38/DAR