Walsh, John W. T. (John William Tudor) <br/><br/>
Textbook of illuminating engineering 
John W. T. Walsh 
 - 2nd ed. 
 -  c.1954 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lighting--EE
<br/><br/><label>Dewey Class. No.: </label>621.321 WAL