Nelkon, Michael. <br/><br/>
Light and sound / 
Michael Nelkon. 
 - 2nd ed. 
 - London :  Heinemann,  1955  [Reprinted 1958] 
 - vii, 364p. :  illus.;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Light.<br/>Sound.
<br/><br/><label>Dewey Class. No.: </label>535  / NEL 1958