Radio spectrum conservation;  a program of conservation based on present uses and future needs. 
A report of the Joint Technical Advisory Committee, IRE-RTMA. 
 - New York,  McGraw-Hill,  1952. 
 - xi, 221p.  group port.,diagrs.  21cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RADIO FRECUENCIA, DISTRIBUCIÓN
<br/><br/><label>Universal Decimal Class. No.: </label>621.396