Reference data for radio engineers 
edited Westman H. P. 
 - 5th ed. 
 - New York  Howard W. Sams  1969 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frequency data<br/>Probability and statistics
<br/><br/><label>Universal Decimal Class. No.: </label>621.396  / REF