Maxwell Knight replies :  225 natural history questions answered / 
Illustred by Rona Cloy 
 - London :  Routledge & Kegan Paul,  1959 
 - 191 p. :  ill ;  20 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electromagnetic waves<br/>Electromagnetic theory
<br/><br/><label>Dewey Class. No.: </label>591.076