00700cam a2200241u 4500 8289060 BD-DhUL 20150115084519.0 830331s1931 enka 000 0 eng 33016187 DLC CarP DLC BD-DhUL TK5751 .R3 1931 23 621.38 RAP Ratcliffe, John Ashworth. The physical principles of wireless / John Ashworth Ratcliffe and 2d ed. London : Methuen, c1931. viii, 104 p. : ill., diagrs. ; 18 cm. Includes bibliographical references and index. Radio. Eve Appleton ddc BK 31268 31268 0 0 ddc 0 621_380000000000000_RAP 0 NFIC 59036 DUSL DUSL GEN 2015-01-15 621.38 RAP 36328 2015-01-15 2015-01-15 BK