Handbook for Radio Operators /  Textual Documents 
Her Majesty`s Stationery Office. 
 - 12th ed. / 
 - London :  Her Majestys Stationery Office ,  1961. 
 - 211p. :  ill ;  22cm . 
<br/><br/><label>Subjects--Index Terms: </label>Radio Operators G-Technology 
<br/><br/><label>Dewey Class. No.: </label>621.383  / H 426 H