00828cam a22002771 4500 7549544 BD-DhUL 20150115112637.0 810415s1967 enka b 001 0 eng 67106439 B67-12962 (OCoLC)7339143 DLC FTS OCoLC Uk DLC BD-DhUL premarc TK6553 .B42 621.384 BEH Betts, J. A. (John Arthur) High frequency communications / J. A. Betts. London : English Universities Press, c1967. [10], 98 p. : il. ; 23 cm. Introductory science texts Includes bibliographical references and index. Shortwave radio. 7 cbc oclcrpl u ncip 19 y-gencatlg ddc BK 31465 31465 0 0 ddc 0 621_384000000000000_BEH 0 NFIC 59324 DUSL DUSL GEN 1972-12-20 Gift 621.384 BEH A93751 2015-01-15 2015-01-15 BK