Crook, W. E. <br/><br/>
Elementary mathematics for wireless operators /  
W. E. Crook 
 - 2da ed.  
 - London :   Sir I. Pitman & sons, ltd,  1943.  
 - vii, 63 p. ;   diagrs. 
<br/><br/><label>Subjects--Topical Terms: </label>--MATEMATICAS--ELECTRÓNICA
<br/><br/><label>Universal Decimal Class. No.: </label>621.3:51