Threshold signals 
edited by James L. Lawson and George E. Uhlenbeck  
 - New York  McGraw-Hill  1950 
 - xii, 388p. 
 - Radiation laboratory series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Signalling<br/>Telecommunication
<br/><br/><label>Universal Decimal Class. No.: </label>654.9  / LAW