Walsh, John W. T. <br/><br/>
Textbook of illuminating engineering:  intermediate grade / 
John W T Walsh 
 - London :   I. Pitman,   c1954. 
 - xii, 202 pages :   illustrations  22 cm. 
<br/><br/> Includes index. 
<br/><br/>
<br/><br/><br/>English. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Lighting.
<br/><br/><label>Dewey Class. No.: </label>621.32/WAT