Croft, Terrell. <br/><br/>
Practical electrical illumination and signal wiring method / 

 - 3rd ed. 
 - New York :  McGraw Hill book company,  1939. 
 - xii, 351 p. :  ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Signal systems -- Wiring<br/>Building wiring -- Methods<br/>Practical electricity -- Instructional works
<br/><br/><label>Dewey Class. No.: </label>621.321  / CRO