LEWIS C.A <br/><br/>
BROADCASTING FROM WITHIN  
C.A.LEWIS 
 - LONDON  1924 
<br/><br/> PE mean Physics, Electricity and Magnetism Page 450-456 in A to Z Register (Acc. No. Pe1-Pe205) 
<br/><br/><label>Dewey Class. No.: </label>PE41