00943cam a22003011 4500 9307322 BD-DhUL 20150114174319.0 820920s1950 enk 000 0 eng 51027560 GB50-12027 (OCoLC)8789528 DLC OU Uk DLC BD-DhUL premarc TK5742 .D57 1950 621.384 DOT Dowsett, H. M. Technical instruction for marine radio officers : (formerly Handbook of technical instruction for wireless telegraphists) / By H.M. Dowsett and L.E.Q. Walker. 9th ed. London : Wireless world, c1950. 699 p. : ill. ; 22 cm. Includes index. Telegraph, Wireless. Walker, L. E. Q. Hawkhead, John Clayborough. 7 cbc oclcrpl u ncip 19 y-gencatlg ddc BK 31131 31131 0 0 ddc 0 621_384000000000000_DOT 0 NFIC 58767 DUSL DUSL GEN 2015-01-14 621.384 DOT 59929 2015-01-14 2015-01-14 BK